Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. Any intelligent fool can make things bigger, more complex, and more violent. Imagination is more important than knowledge. The only real valuable thing is intuition. Everything should be made as simple as possible, but not simpler.
Common sense is the collection of prejudices acquired by age eighteen.
The secret to creativity is knowing how to hide your sources. The only thing that interferes with my learning is my education. The important thing is not to stop questioning. Curiosity has its own reason for existing. The hardest thing in the world to understand is income tax.