Who said “A theory must be tempered with reality.”?

“Reality is something you rise above.”

“Reality is nothing but a collective hunch.”

“Reality in our century is not something to be faced.”

“Reality is that which, when you stop believing in it, doesn't go away.”

“It is astonishing what force, purity, and wisdom it requires for a human being to keep clear of falsehoods.”

“Every little thing counts in a crisis.”

“Those who are prepared to die for any cause are seldom defeated.”

“Facts are facts and will not disappear on account of your likes.”

“Action itself, so long as I am convinced that it is right action, gives me satisfaction.”

“Crises and deadlocks when they occur have at least this advantage, that they force us to think.”

“What we need is a generation of peace.”