Demonstration is also something necessary, because a demonstration cannot go otherwise than it does, ... And the cause of this lies with the primary premises/principles.

Those who educate children well are more to be honored than they who produce them; for these only gave them life, those the art of living well.

The life of money-making is one undertaken under compulsion, and wealth is evidently not the good we are seeking; for it is merely useful and for the sake of something else.

We must be neither cowardly nor rash but courageous.

The good lawgiver should inquire how states and races of men and communities may participate in a good life, and in the happiness which is attainable by them.

There is no great genius without a mixture of madness.

All human actions have one or more of these seven causes: chance, nature, compulsions, habit, reason, passion, desire.