k. vii. ch. xiv.; "Phaedo,"Secs. 63-67, 73.

2. _The idea of_ CAUSE (aitia)--the power or efficiency by which things
that "become," or begin to be, are generated or produced.--"Timaeus," ch.
ix.; "Sophist," Sec. 109; "Philebus," Secs. 45, 46.

3. _The idea of_ IDENTITY (auto to ison)--that which "does not change,"
"is always the same, simple and uniform, incomposite and
indissoluble,"--that which constitutes personality or
self-hood.--"Phaedo," Secs. 61-75; "Timaeus," ch. ix.; "Republic," bk. ii.
ch. xix. and xx.

4. _The idea of_ UNITY (to en)--one _mind_ or intelligence pervading the
universe, the comprehensive conscious _thought_ or _plan_ which binds
all parts of the universe in one great whole (to pan)--the principle of
_order_.--"Timaeus," ch. xi. and xv.; "Republic," bk. vi. ch. xiii.;
"Philebus," Secs. 50-51.

5. _The idea of the_ INFINITE (to apeiron)--that which is unlimited and
unconditioned, "has no parts, bounds, no beginning, nor middle, nor
end."--"Parmenides," Secs. 22, 23.

II. _The idea of_ ABSOLUTE BEAUTY (to kalon)--the formal cause of the
universe, and by participation in which all created things have only so
far a real beauty.--"Timaeus," ch. xi, "Greater Hippias," Secs. 17, 18;
"Republic," bk. v. ch. 22.

This idea is developed in the human intelligence in its relation to the
organic world; as,

1. _The Idea of_ PROPORTION or SYMMETRY (symmetria)--the
proper relation of parts to an organic whole resulting in a
harmony (cosmos), and which relation admits of mathematical
expression.--"Timaeus," ch. lxix.; "Philebus," Sec. 155
("Timaeus," ch. xi. and xii., where the relation of numerical
proportions to material elements is expounded).

2. _The idea of_ DETERMINATE FORM (paradeigma
archetypos)--the eternal models or archetypes according to
which all things are framed, and which admit of geometrical
representation.--"Timaeus," ch. ix.; "Phaedo," Sec.112 ("Timaeus,"
ch. xxviii.-xxxi., where the relation of geometrical forms
to material elements is exhibited).

3. _The idea of_ RHYTHM (rythmos)--measured movement in time
and space, resulting in melody and grace.--"Republic," bk.
iii. ch. xi. and xii.; "Philebus," Sec. 21.

4. _The idea of_ FITNESS or ADAPTATION
(chresimon)--effectiveness to some purpose or end.--"Greater
Hippias," Sec. 35.

5. _The idea of_ PERFECTION (teleiote