When two friends are in the mood to chat, we have to go about it in a gentler and more dialectical way. By 'more dialectical,' I mean not only that we give real responses, but that we base our responses solely on what the interlocutor admits that he himself knows.
No attempt of curing the body should be made without curing the soul
As it is, the lover of inquiry must follow his beloved wherever it may lead him.
Astronomy compels the soul to look upwards and leads us from this world to another.
For a man to conquer himself is the first and noblest of all victories.
Those wretches who never have experienced the sweets of wisdom and virtue, but spend all their time in revels and debauches, sink downward day after day, and make their whole life one continued series of errors.