We must believe in the external world, yet we can only know ... - Willard Van Orman Quine

"We must believe in the external world, yet we can only know it through mental mediation."

Willard Van Orman Quine Truth

Philosopher Logician American 1908–2000

More from Willard Van Orman Quine

"To be is to be the value of a variable"

"The totality of our so-called knowledge or beliefs is a man-made fabric which impinges on experience only along the edges"

"No entity without identity"

"We can never do just one thing"

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."