The best friend is he that, when he wishes a person's good, wishes it for that person's own sake.

Saying the words that come from knowledge is no sign of having it.

But obviously a state which becomes progressively more and more of a unity will cease to be a state at all. Plurality of numbers is natural in a state; and the farther it moves away from plurality towards unity, the less of a state it becomes and the more a household, and the household in turn an individual.

My lectures are published and not published; they will be intelligible to those who heard them, and to none beside.

It will contribute towards one's object, who wishes to acquire a facility in the gaining of knowledge, to doubt judiciously.

The soul has two parts, one rational and the other irrational. Let us now similarly divide the rational part, and let it be assumed that there are two rational faculties, one whereby we contemplate those things whose first principles are invariable, and one whereby we contemplate those things which admit of variation.

Man by Nature desires to know.