Aristotle

Poverty is the parent of revolution and crime.

The so-called Pythagoreans, who were the first to take up mathematics, not only advanced this subject, but saturated with it, they fancied that the principles of mathematics were the principles of all things.

The soul never thinks without a mental picture.

Misfortune shows those who are not really friends.

Mothers are fonder than fathers of their children because they are more certain they are their own.

Nature does nothing uselessly.

It is the nature of desire not to be satisfied, and most men live only for the gratification of it.

The beginning of reform is not so much to equalize property as to train the noble sort of natures not to desire more, and to prevent the lower from getting more.

To Thales the primary question was not what do we know, but how do we know it.

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