Madness comes from God, whereas sober sense is merely human.

The point which I should first wish to understand is whether the pious or holy is beloved by the gods because it is holy, or holy because it is beloved of the gods.

The true lover of knowledge naturally strives for truth, and is not content with common opinion, but soars with undimmed and unwearied passion till he grasps the essential nature of things.

Not one of them who took up in his youth with this opinion that there are no gods ever continued until old age faithful to his conviction.

Do not train children to learning by force and harshness, but direct them to it by what amuses their minds.

The object of knowledge is what exists and its function to know about reality.

The honour of parents is a fair and noble treasure to their posterity, but to have the use of a treasure of wealth and honour, and to leave none to your successors, because you have neither money nor reputation of your own, is alike base and dishonourable.