Colours may best be expressed by a heptad, the largest possible formula for
things finite, as the pentad is the smallest possible form. Indeed, the
heptad of things finite is in all cases reducible to the pentad. The
adorable tetractys, or tetrad, is the formula of God; which, again, is
reducible into, and is, in reality, the same with, the Trinity. Take
colours thus:--
Prothesis,
Red, or Colour [Greek: kat exoch_en].
^
/1\
/ \
Mesothesis, or Indifference of / \
Red and Yellow = Orange. 4/ \5 Indigo, Violet = Indifference
/Synthesis\ of Red and Blue.
/--6 \
Thesis = Yellow. 2 3 Blue = Antithesis.
\Green indi-/
\componi- /
\ble /
\ /
\ /
To which you must add \7/ which is spurious or artificial
v synthesis of Yellow and Blue.
Green,
decom-
ponible
_April_ 28. 1832.