“In the matter of physics, the first lessons should contain nothing but what is experimental and interesting to see. A pretty experiment is in itself often more valuable than twenty formulae extracted from our minds.”

“Either CS (coordinate system) could be used with equal justification. The two sentences: the sun is at rest and the earth moves, or the sun moves and the earth is at rest, would simply mean two different conventions concerning two different CS”

“Engineering is not only study of 45 subjects but it is moral studies of intellectual life. Make things as simple as possible..but not simpler.”

“Each makes this cosmos and its construction the pivot of his emotional life, in order to find in this way peace and security which he can not find in the narrow whirlpool of personal experience.”

“Games are the most elevated form of investigation.”

“Water the fruit trees and don’t water the thorns.”

“If you do not possess the staff of caution and discrimination, use the eyes of him who sees. If there is no staff of caution and discrimination, do not wander on the road without a guide.”

“To be able to discern that what is true is true, and that what is false is false,--this is the mark and character of intelligence.”