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.

A man can make up his mind quickly when he has only a little to make up.

Our account does not rob the mathematicians of their science... In point of fact they do not need the infinite and do not use it.

Nature does nothing without a purpose. In children may be observed the traces and seeds of what will one day be settled psychological habits, though psychologically a child hardly differs for the time being from an animal.

A great city is not to be confounded with a populous one.

The character which results from wealth is that of a prosperous fool.

Happiness may be defined as good fortune joined to virtue, or a independence, or as a life that is both agreeable and secure.