Property should be in a certain sense common, but, as a general rule, private; for, when every one has a distinct interest, men will not complain of one another, and they will make more progress, because every one will be attending to his own business.

We have next to consider the formal definition of virtue.

To be angry is easy. But to be angry with the right man at the right time and in the right manner, that is not easy.

The wise man knows of all things, as far as possible, although he has no knowledge of each of them in detail

Life in the true sense is perceiving or thinking.

No one chooses what does not rest with himself, but only what he thinks can be attained by his own act.

For nature by the same cause, provided it remain in the same condition, always produces the same effect, so that either coming-to-be or passing-away will always result.