Heroes to me are guys that sit in libraries. They absorb knowledge and then the risks they take are calculated on the basis of the courage it took to become replete with knowledge.
If you would be a real seeker after truth it is necessary that at least once in your life you doubt as far as possible all things.
The senses deceive from time to time and it is prudent never to trust wholly...
Each problem that I solved became a rule which served afterwards to solve...
When it is not in our power to follow what is true we ought to follow what...
The truth was much more beautiful.
Don't call the world dirty because you forgot to clean your glasses.
If you tell the truth, you don’t have to remember anything.
