In the part of this universe that we know there is great injustice， and often the good suffer， and often the wicked prosper， and one hardly knows which of those is the more annoying.

To see is to forget the name of the thing one sees.

Happiness lies in the joy of achievement and the thrill of creative effort.

The most important thing in science is not to solve problems, but to ask the right questions.

"You can't do anything about the length of your life, but you can do something about its width and depth."