I consider as lovers of books not those who keep their books hidden in their store-chests and never handle them, but those who, by nightly as well as daily use thumb them, batter them, wear them out, who fill out all the margins with annotations of many kinds, and who prefer the marks of a fault they have erased to a neat copy full of faults.
I am a lover of liberty. I will not and I cannot serve a party.
I have no patience with those who say that sexual excitement is shameful and that venereal stimuli have their origin not in nature, but in sin. Nothing is so far from the truth. As if marriage, whose function cannot be fulfilled without these incitements, did not rise above blame. In other living creatures, where do these incitements come from? From nature or from sin? From nature, of course. It must borne in mind that in the apetites of the body there is very little difference between man and other living creatures. Finally, we defile by our imagination what of its own nature is fair and holy. If we were willing to evaluate things not according to the opinion of the crowd, but according to nature itself, how is it less repulsive to eat, chew, digest, evacuate, and sleep after the fashion of dumb animals, than to enjoy lawful and permitted carnal relations?
You must acquire the best knowledge first, and without delay; it is the height of madness to learn what you will later have to unlearn.
Wherever you encounter truth, look upon it as Christianity.
A constant element of enjoyment must be mingled with our studies, so that we think of learning as a game rather than a form of drudgery, for no activity can be continued for long if it does not to some extent afford pleasure to the participant.
Do not be guilty of possessing a library of learned books while lacking learning yourself.
There is nothing I congratulate myself on more heartily than on never having joined a sect.
For what is life but a play in which everyone acts a part until the curtain comes down?
I am a citizen of the world, known to all and to all a stranger.