Plato

Those who intend on becoming great should love neither themselves nor their own things, but only what is just, whether it happens to be done by themselves or others.

Ignorance of all things is an evil neither terrible nor excessive, nor yet the greatest of all but great cleverness and much learning, if they be accompanied by a bad training, are a much greater misfortune.

Nothing in the affairs of men is worthy of great anxiety.

Poets utter great and wise things which they do not themselves understand.

Better a little which is well done, than a great deal imperfectly.

The greatest wealth is to live content with little.