The world is a dangerous place to live, not because of the people who are evil, but because of the people who don't do anything about it. Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. A person starts to live when he can live outside himself. Imagination is more important than knowledge. Knowledge is limited.
Imagination encircles the world.
In the middle of difficulty lies opportunity. The most beautiful thing we can experience is the mysterious. The only real valuable thing is intuition. The significant problems we face cannot be solved at the same level of thinking we were at when we created them. The whole of science is nothing more than a refinement of everyday thinking.