Physical Knowledge

Famous quotes containing the words physical and/or knowledge:

“The struggle for existence holds as much in the intellectual as in the physical world. A theory is a species of thinking, and its right to exist is coextensive with its power of resisting extinction by its rivals.”
—Thomas Henry Huxley (1825–95)

“Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.”
—Samuel Johnson (1709–1784)