“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.”

“What man dare, I dare.Approach thou like the rugged Russian bear,The armed rhinoceros, or th' Hyrcan tiger;Take any shape but that, and my firm nervesShall never tremble.”

“Men are so charmed with valor that they have pleased themselves with being called lions, leopards, eagles and dragons, from the animals contemporary with us in the geologic formations.”

“There's no better sign of a brave mind than a hard hand.”