And this lies in the nature of things: What people are potentially is revealed in actuality by what they produce.

Of the irrational part of the soul again one division appears to be common to all living things, and of a vegetative nature.

To the size of the state there is a limit, as there is to plants, animals and implements, for none of these retain their facility when they are too large.

[I]t is rather the case that we desire something because we believe it to be good than that we believe a thing to be good because we desire it. It is the thought that starts things off.

A period may be defined as a portion of speech that has in itself a beginning and an end, being at the same time not too big to be taken in at a glance

These two rational faculties may be designated the Scientific Faculty and the Calculative Faculty respectively; since calculation is the same as deliberation, and deliberation is never exercised about things that are invariable, so that the Calculative Faculty is a separate part of the rational half of the soul.

In the works of Nature, purpose, not accident, is the main thing.