Aristotle

Of mankind in general, the parts are greater than the whole.

Men create the gods after their own images.

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.

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.

The physician heals, Nature makes well.

We do not know a truth without knowing its cause.

Philosophy is the science which considers truth.

It is the mark of an educated mind to rest satisfied with the degree of precision which the nature of the subject admits and not to seek exactness where only an approximation is possible.

Excellence is an art won by training and habituation.

If happiness is activity in accordance with excellence, it is reasonable that it should be in accordance with the highest excellence.

The same ideas, one must believe, recur in men's minds not once or twice but again and again.

It is more difficult to organize a peace than to win a war; but the fruits of victory will be lost if the peace is not organized.

Those who believe that all virtue is to be found in their own party principles push matters to extremes; they do not consider that disproportion destroys a state.

Not to get what you have set your heart on is almost as bad as getting nothing at all.

Whereas the law is passionless, passion must ever sway the heart of man.

He who is by nature not his own but another's man is by nature a slave.

When quarrels and complaints arise, it is when people who are equal have not got equal shares, or vice-versa.

They who have drunk beer, fall on their back, but there is a peculiarity in the effects of the drink made from barley, for they that get drunk on other intoxicating liquors fall on all parts of their body, they fall on the left side, on the right side, on their faces, and and on their backs. But it is only those who get drunk on beer that fall on their backs with their faces upward.

The hardest victory is the victory over self.

Happiness, whether consisting in pleasure or virtue, or both, is more often found with those who are highly cultivated in their minds and in their character, and have only a moderate share of external goods, than among those who possess external goods to a useless extent but are deficient in higher qualities.

In everything, it is no easy task to find the middle.