Quote by Galileo Galilei
"The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function."
More from Galileo Galilei
"In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual."
"All truths are easy to understand once they are discovered; the point is to discover them."
"We cannot teach people anything; we can only help them discover it within themselves."
"Mathematics is the language in which God has written the universe."