All communication must lead to change

But also philosophy is not about perceptible substances they, you see, are prone to destruction.

It was through the feeling of wonder that men now and at first began to philosophize.

We are better able to study our neighbours than ourselves, and their actions than our own.

All human happiness and misery take the form of action.

What has soul in it differs from what has not, in that the former displays life. Now this word has more than one sense, and provided any one alone of these is found in a thing we say that thing is living. Living, that is, may mean thinking or perception or local movement and rest, or movement in the sense of nutrition, decay and growth. Hence we think of plants also as living, for they are observed to possess in themselves an originative power through which they increase or decrease in all spatial directions.

Man, as an originator of action, is a union of desire and intellect.