“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.”

“Love will not be spurred to what it loathes”

“Tis in ourselves that we are thus or thus. Our bodies are our gardens, to the which our wills are gardeners: so that if we will plant nettles, or sow lettuce, set hyssop and weed up tine, supply it with one gender of herbs, or distract it with many, either to have it sterile with idleness, or manured with industry, why, the power and corrigible authority of this lies in our wills.”

“Many have been led astray by the Qur'an: by clinging to that rope many have fallen into the well. There is no fault in the rope, O perverse man, for it was you who had no desire to reach the top.”