Prejudices are so to speak the mechanical instincts of men: through their prejudices they do without any effort many things they would find too difficult to think through to the point of resolving to do them.
Some old men, continually praise the time of their youth. In fact, you would almost think that there were no fools in their days, but unluckily they themselves are left as an example.
At every crossroads on the path that leads to the future, tradition has placed 10,000 men to guard the past.
If one were to bring ten of the wisest men in the world together and ask them what was the most stupid thing in existence, they would not be able to discover anything so stupid as astrology.
He had read much, if one considers his long life but his contemplation was much more than his reading. He was wont to say that if he had read as much as other men he should have known no more than other men.