
Metaphysics
- Prædicables
- Genus (génos)
- Species (ī̂dos)
- Difference (diaphorá)
- Property (ídion)
- Accident (symbebicós)
- Anteprædicamenta
- Univocal (synṓnymon)
- Æquivocal (homṓnymos)
- Demonitive (parṓnymos)
- Prædicamenta (catēgoríæ)
- Substance (usía)
- Quantity (posón)
- Relation (prós ti)
- Quality (pϗn)
- Time (póte)
- Place (pû)
- Position (cī̂sthæ)
- Habit (échīn)
- Activity (pœeîn)
- Passion (páschīn)
- Causes (ǽtion)
- Matter (hýlē)
- Form (ī̂dos)
- Efficient (cinûn)
- Perfect (télos)
- Unions (hénōsis)
- Substance (cat’ usían)
- Hypostasis (cath’ ypóstasin)
- Stationary (catà schésin)
- Welding (catà paráthesin)
- Joining (catà harmonían)
- Mingling (catà crásin)
- Mixture (catà phýrsin)
- Fusion (catà sýnchysin)
- Heaping (catà sōrī́an)
- Coalescence (catà synalœphḗn)
Starting with being in the most generic sense, we may divide it positively into corporeal or negatively into incorporeal. That which is incorporeal then constitutes spirit, & that which is different as corporeal, body. We may then do the same with body into animate & inanimate, where the animate is life, & the inanimate, mineral. Again, with life, into sentient & insentient, which is animal & plant. And again, animal into rational & irrational, i.e. man & beast.
Having differentiated from the most abstract—i.e. generic—to the most immanant—i.e. specific—we may no longer divide according to species, but enumeration, e.g. Peter, Paul, John &c.

So we have then formed the image of a tree, with the most specific species as the roots, & the supreme genus as the tip.
Prædicamenta
| Prædicament | E.g. |
|---|---|
| Substance | What is it being? |
| Quantity | How much is it? |
| Relation | To what is it? |
| Quality | Like what is it? |
| Time | When is it? |
| Place | Where is it? |
| Position | How is it doing? |
| Habit | How is it being? |
| Activity | What is it doing? |
| Passion | What is done to it? |
Quanta
- Discrete
- Number
- Speech
- Continous
- Time
- Space
- Line
- Surface
- Solid
See the grammar page for more on speech, & the astronomy page for more on time.
Qualities
| Quality | I.e. |
|---|---|
| Habit | Uneasily changable activity. |
| Disposition | Easily changable activity. |
| Potency | Having that power. |
| Impotency | Not having that power. |
| Affection | Lightly acted upon. |
| Passivity | Firmly acted upon. |
| Shape | Of inanimate & animate bodies. |
| Form | Of only animate bodies. |
Causes
| Cause | E.g. |
|---|---|
| Matter | What is it made of? |
| Form | What is it made after? |
| Efficient | What is it made by? |
| Perfect | What it made for? |
In the example of a table: the wood is the material cause, the carpenter’s plan is the formal cause, the carpenter’s tool is the efficient cause, & dining on is the perfect cause.
See Luke Smith’s article.
Unions
| Union | E.g |
|---|---|
| Substance | …of hypostases. |
| Hypostasis | …of soul & body. |
| Stationary | …of judgements by will. |
| Welding | …of brass & lead. |
| Joining | …of stones & wood. |
| Mingling | …of wine & water. |
| Mixture | …of wheatmeal & water. |
| Fusion | …of wax & pitch. |
| Heaping | …of wheat & barley. |
| Coalescence | …of a brand & fire. |
Motions
| Substance | Quantity | Quality | Place |
|---|---|---|---|
| Generation | Increase | Alteration | Circular |
| Destruction | Decrease | Direct |
Physics
- Elements (stœchī̂on)
- Fire (pŷr)
- Air (aḗr)
- Water (hýdōr)
- Earth (gē̂)
- Humors (chymós)
- Yellow Bile (xanthḕ cholḗ)
- Blood (hæ̂ma)
- Phlegm (phlégma)
- Black Bile (mélæna cholḗ)
- Bodies (sō̂ma)
- Head
- Trunk
- Arms
- Legs
- Souls (psychḗ)
- Species
- Rational – i.e. has reason.
- Sensitive – i.e. has feeling.
- Vegetative – i.e. has growth.
- Faculties
- Intellect (nûs)
- Reason (diánœa)
- Conception (epínœa)
- Imagination (phantasía)
- Partitions
- Intelligent (logisticón)
- Incensive (thymoīdés)
- Appetative (epithymēticón)
- Species
- Sensation (ǽsthēsis)
- Vision
- Hearing
- Smell
- Taste
- Touch
- Colors (chrō̂ma)
- White (leucû)
- Yellow (xanthòn)
- Red (phœnicûn)
- Purple (halurgón)
- Green (prásinon)
- Blue (cyanûn)
- Black (mélan)
Matter
Material bodies exist as the concurrence of these qualities:
- Light & Heavy
- Dense & Rare
- Soft & Resistant
- Fluid & Dry
- Cold & Hot
- Color & Shape
- Outline & Extension
But it should be known these are in themselves not matter but, rather, bare concepts.
Elements
| Element | Attributes |
|---|---|
| Fire | Hot & Dry |
| Air | Hot & Wet |
| Water | Cold & Wet |
| Earth | Cold & Dry |
Some class æther (æthḗr) as a fifth element (Latin: quintessence), while others consider it a special kind of fire. At any rate, it is celestial.
The elements & the sense each is the mean of:
- Fire – of vision
- Air – of hearing
- Water – of smell
- Earth – of taste
The sense of touch is usually omitted as a common background sense.
Body
| Humor | Organ |
|---|---|
| Yellow Bile | Gallbladder |
| Blood | Liver |
| Phlegm | Brain |
| Black Bile | Spleen |
Food is chewed through the mouth, passed down to the stomach, which then converts what is nutritious into a liquid & gives it to the liver, but sends what isn’t nutritious down to the intestine to be exited. The liver converts the liquid from the stomach into like itself—i.e blood—& further sends the fiery impurities to the gallbladder, but the earthy impurities to the spleen. The liver then distributes the blood throughout the body via the veins. The kidneys catch the spent watery part of the blood, which acted as its vehicle along the veins & sends it down to the bladder to be exited.
Air is inhaled by the nostrils to the lungs, which hold it. The heart then takes the air from the lungs according to its rhythem, heats, & distributes breath throughout the body by the arteries. It also takes the expired breath from the arteries & sends it to the lungs to be exited. As the arteries contract with pulsation, the blood from the veins is drawn into the artery & infused with the breath, which is then sent back out into the veins with pulsation.
The senses & their organ of function:
- Vision – of the eyes
- Hearing – of the ears
- Smell – of the nostrils
- Taste – of the tongue(s)
The soul’s faculties & their ventricle of function in the brain:
- Imagination – in the anterior ventricle
- Reason – in the interior ventricle
- Memory – in the posterior ventricle

The separate senses are collected together in the imagination, which in the rational creature then communicates the common sense by the reason to the intellect.
Soul
| Partition | Faculty | Location |
|---|---|---|
| Intelligent | Reason (lógos) | Head |
| Incensive | Passion (thymós) | Chest |
| Appetative | Affection (érōs) | Belly |
Colors
| Color | Hour |
|---|---|
| White | —————— |
| Yellow | Noonday |
| Red | Afternoon |
| Purple | Evening |
| Green | Sunset |
| Blue | Night |
| Black | —————— |
Order of the colors as seen progressing through the hours of the day.
The color white is the dilation of sight, but black is the contraction of it. The colors yellow, red, purple, green, & blue, are ratios of white & black.
Music
- Genera
- Diatonic
- Soft Chromatic
- Hard Chromatic
- Enharmonic
- Species
- Dorian
- Phyrgian
- Lydian
- Mixolydian
- Ratios
- Fourth (diatessárōn)
- Fifth (diapénte)
- Tetrachord (tetráchordon)
- Octave (diapasṓn)
Scale
| ni | / | pa | / | bu | / | ga | / | di | / | ce | / | zo | / | ni |
Notation
| Sign | Name | Significance |
|---|---|---|
| 𝁆 | íson | Initial note. |
| 𝁇 | olígon | Ascend note. |
| 𝁑 | apóstrophos | Descend note. |
| 𝁉 | petastḗs | Ascend note (stressed). |
| 𝃰 | centḗmaton | Ascend note (destressed). |
Measurements
- Lengths
- Digit (dáctylos)
- Palm (palæstḗ)
- Span (spithamḗ)
- Foot (pûs)
- Cubit (pē̂chys)
- Pace (bē̂ma)
- Fathom (orgyiá)
- Perch (decápodon)
- Plethron (pléthron)
- Stade (stádion)
- Mile (mílion)
- Area
- Acre (strémma)
- Weights
- Scurple (grámma)
- Semis (sēmmísis)
- Solidus (nómisma)
- Ounce (ungía)
- Pound (lítra)
- Volumes
- Cup (cotýlē)
- Pot (xéstēs)
- Handful (phûcta)
λͅ & £ are abbreviation signs for pound, Greek lítra & Latin libra. The latter is only used contemperarily for British money.
The foot was standardized by that of Agrippa—general of Augustus & husband of his daughter Julia the Elder—when he built what would become the Church of the Panagia & the Martyrs, Italy.
Lengths
| Measure | Definition | Equals (ft.) | Equals (dig.) |
|---|---|---|---|
| Digit | = 1 digit | = 1/16 ft. | = 1 dig. |
| Palm | = 4 digits | = 1/4 ft. | = 4 dig. |
| Span | = 3 palms | = 3/4 ft. | = 12 dig. |
| Foot | = 4 palms | = 1 ft. | = 16 dig. |
| Cubit | = 2 spans | = 1 1/2 ft. | = 24 dig. |
| Pace | = 2 1/2 feet | = 2 1/2 ft. | = 40 dig. |
| Double Pace | = 5 feet | = 5 ft. | = 80 dig. |
| Fathom | = 8 spans | = 6 ft. | = 96 dig. |
| Perch | = 10 feet | = 10 ft. | = 160 dig. |
| Plethron | = 10 perches | = 100 ft. | = 1,600 dig. |
| Stade | = 6 plethra | = 600 ft | = 9,600 dig. |
| Mile | = 8 1/3 stadia | = 5,000 ft. | = 80,000 dig. |
| Day’s Journey | = 3 miles | = 150,000 ft. | —————— |
| Week’s Journey | = 21 miles | = 1,050,000 ft. | —————— |
- The digit is also called the finger & unit.
- The palm is also called the handbreadth.
- The perch is also called the rod.
- The stade is now called the cable.
- The conversion of contemporary lengths:
| Measure | Definition | Equals (ft.) | Equals (dig.) |
|---|---|---|---|
| Inch | = 1/12 foot | = 1/12 ft. | = 1 1/2 dig. |
| Yard | = 1/2 fathom | = 3 ft. | = 48 dig. |
| Furlong | = 1 stade | = 600 ft. | = 9,600 dig. |
| League | = 1 1/2 miles | = 7,500 ft. | = 120,000 dig. |
Area
| Measure | Definition | Equals (ft.) |
|---|---|---|
| Acre | = 1x1 plethron | = 100x100 ft. |
Weights
| Measure | Definition | Equals (lb.) |
|---|---|---|
| Scruple | = 1/24 ounce | = 3/64 lb. |
| Semis | = 1/12 ounce | = 5/64 lb. |
| Solidus | = 1/6 ounce | = 1/72 lb. |
| Ounce | = 1 ounce | = 1/12 lb. |
| Pound | = 12 ounces | = 1 lb. |
- The conversion of contemporary weights:
| Measure | Definition | Equals (lb.) |
|---|---|---|
| Carat | = 1/144 ounce | = 1/1,728 lb. |
| Obol | = 1/48 ounce | = 1/64 lb. |
Volumes
| Measure | Definition | Equals (lb.) |
|---|---|---|
| Ounce | = 1 ounce | = 1/12 lb. |
| Cup | = 1 1/2 ounces | = 1/8 lb. |
| Pot | = 3 ounces | = 1/4 lb. |
| Pound | = 12 ounces | = 1 lb. |
| Handful | = 18 1/2 ounces | = 1 13/34 lbs. |
- The conversion of contemporary volumes:
| Measure | Definition | Equals (oz.) |
|---|---|---|
| Pint | = 1/2 quart | = 2 1/4 oz. |
| Quart | = 1/4 gallon | = 4 1/2 oz. |
| Gallon | = 6 pots | = 18 oz. |
Other
Plants & Minerals
- Plants (phytón)
- Types
- Tree
- Shrub
- Under-shrub
- Herb
- Parts
- Root
- Stem
- Bark
- Leaf
- Fruit
- Types
- Minerals (oryctó)
- Stones (líthos)
- Diamond
- Amber
- Sardius (sárdion)
- Emerald (smáragydos)
- Jacinth (hyácinthos)
- Topaz (topázion)
- Amethyst (améthystos)
- …
- Marble
- Granite
- Sandstone
- Limestone
- …
- Metals (métallon)
- Gold (chrysós)
- Silver (árgyros)
- Iron (sídērous)
- Brass (chalcós)
- Tin
- Lead
- Stones (líthos)
Stone are also called rock (pétra). Sardius is also called ruby. Jacinth is also called sapphire. Brass is also called bronze & copper.
Some count tin & lead as one kind of metal, while others distinguish quicksilver (hydrárgyros) from silver.
Stones are formed by a dry affection (i.e. earth), but metals are by a wet affection (i.e. water).
To alloy a metal is to mix it with another, less valuable, metal, e.g. lead. This produces compound metal, such as brass—which is usually alloyed with lead or tin. A recent contemporary metall alloy is steel—which is iron alloyed with brass.
Some notable precious stones & thier colors:
| Precious Stone | Color |
|---|---|
| Pearl | White |
| Amethyst | Opaque Red |
| Jacinth | Opaque Blue |
| Chrysoprase | Striped Yellow |
| Topaz | Clear Yellow |
| Beryl | Opaque Green |
| Chrysolyte (Peridot) | Opaque Yellow |
| Sardius | Clear Red |
| Onyx | Striped Red |
| Emerald | Clear Green |
| Calcedony | Striped Green |
| Sapphire (Lapis Lazuli) | Striped Blue |
| Jasper | Clear Blue |
| Carbuncle | (cf. Chalcedony) |
| Agate | (cf. Jacinth) |
| Ligure | (cf. Chrysoprase) |
| Opal | (cf. Chrysoprase) |
| Diamond | (cf. Jasper) |
References
- John of Damascus, St. “Philosophical Chapters” in: The Fount of Knowledge.
- John of Damascus, St. “An Exact Exposition of the Orthodox Faith” in: The Fount of Knowledge.
- Nicodemus the Hagiorite, St; Macarius of Corinth, St. The Philocalia.
- Epiphanius of Salamis, St. On Weights and Measures.
- Nemesius of Emesa. On the Nature of Man.
- Porphyry. Isagoge.
- Aristotle. Categories.
- Aristotle. Metaphysics.
- Aristotle. Meteorology.
- Galen. On the Faculties of Aliments.
- Galen. On the Natural Faculties.
- Galen. On the Usefulness of Parts.
- Hippocrates. Humors.
- Plato. Timæus.
- Iamblichus. The Theology of Arithmetic.
- Nicomachus. Manual of Harmonics.
- Pliny the Elder. Natural History
- Theophrastus. Enquiry into Plants.