Knowledge ... shall always bear witness like a clarion to its creator.

I have offended God and mankind because my work didn't reach the quality it should have.

Whatever you do in life, if you want to be creative and intelligent, and develop your brain, you must do everything with the awareness that everything, in some way, connects to everything else.

Although human ingenuity may devise various inventions which, by the help of various instruments, answer to one and the same purpose, yet will it never discover any inventions more beautiful, more simple or more practical than those of nature, because in her inventions there is nothing lacking and nothing superfluous; and she makes use of no counterpoise when she constructs the limbs of animals in such a way as to correspond to the motion of their bodies, but she puts into them the soul of the body.

He who has access to the fountain does not go to the water-pot.

Men of genius sometimes accomplish most when they work least, for they are thinking out inventions.

I have solved what color is, however ; I still have no idea about what line is.