Of all the things which a man has, next to the gods his soul is the most divine and most truly his own.
As it is, lovers of inquiry must follow their beloved wherever it may lead.
Hardly any human being is capable of pursuing two professions or two arts rightly.
Everywhere there is one principle of justice, which is the interest of the stronger.
The one who learns and learns and doesn't practice is like the one who plows and plows and never plants.
Great parts produce great vices as well as virtues.