I put forward formless and unresolved notions, as do those who publish doubtful questions to debate in the schools, not to establish the truth but to seek it.

No noble thing can be done without risks.

In truth, the care and expense of our fathers aims only at furnishing our heads with knowledge; of judgement and virtue, little news.

Vexations may be petty, but they are vexations still.

An ancient father says that a dog we know is better company than a man whose language we do not understand.

I must accommodate my history to the hour: I may presently change, not only by fortune, but also by intention.

Stubborn and ardent clinging to one's opinion is the best proof of stupidity.