Between the truth and the faith, we must always choose the first one.

Mortal man! You've wasted your time mostly with wrong and empty beliefs! And now you have started understanding that most important thing in life is existence!

Happiness in nature is a double happiness; sorrow in nature is a half sorrow!

Do not discuss the religious matters with people; do not waste your valuable time to discuss the untruth! Your time is short; spend it for the science and the art!

The greatest victory for man is not that his dreams were fulfilled but it is that to stand upright even when none of his dreams were fulfilled!

Knowledge can protect you much better than a strong castle!

Fame is a devil; obscurity is an Angel! Stay away from me, Devil; Come near to me, Angel!