Quote by Jean d'Alembert
"Humor is the only test of gravity, and gravity of humor."
"Humor is the only test of gravity, and gravity of humor."
"Doubt is an uncomfortable condition, but certainty is a ridiculous one."
"The greatest mathematicians, like the greatest poets, are men of imagination."
"I believe in God, but I do not believe that God has any of the properties which theologians ascribe to him."
"The true method of knowledge is experiment."