Science. This word is sometimes defined by Plato to be that which assigns
the causes of things; sometimes to be that the subjects of which have a
perfectly stable essence; and together with this, he conjoins the
assignation of cause from reasoning. Sometimes again he defines it to be
that the principles of which are not hypotheses; and, according to this
definition, he asserts that there is one science which ascends as far as
to the principle of things. For this science considers that which is
truly the principle as unhypothetic, has for its subject true being, and
produces its reasonings from cause. According to the second definition,
he calls dianoetic knowledge science; but according to the first alone,
he assigns to physiology the appellation of science.

The telestic art. The art pertaining to mystic ceremonies.

Theurgic. This word is derived from [Greek: Theourgia], or that religious
operation which deifies him by whom it is performed as much as is possible
to man.

Truth, [Greek: aletheia]. Plato, following ancient theologists, considers
truth multifariously. Hence, according to his doctrine, the highest truth
is characterized by unity, and is the light proceeding from the good,
which imparts purity, as he says in the Philebus, and union, as he says
in the Republic, to intelligibles. The truth which is next to this in
dignity is that which proceeds from intelligibles, and illuminates the
intellectual orders, and which an essence unfigured, uncolored, and
without contact, first receives, where also the plain of truth is
situated, as it is written in the Phaedrus. The third kind of truth is,
that which is connascent with souls, and which through intelligence comes
into contact with true being. For the psychical light is the third, from