It is not enough to have a good mind, the main thing is to use it well.

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The reading of all good books is like a conversation with the finest minds of past centuries.

The senses deceive from time to time, and it is prudent never to trust wholly those who have deceived us even once.

Travelling is almost like talking with those of other centuries.

Each problem that I solved became a rule which served afterwards to solve other problems.

There is only one good, knowledge, and one evil, ignorance.

Good night and sweet dreams, my love!

Sex is always about emotions. Good sex is about free emotions; bad sex is about blocked emotions.

Love is not affectionate feeling, but a steady wish for the loved person's ultimate good as far as it can be obtained.