Paul Oskar Kristeller

"Ideas can only be met by ideas, and force by force."

"In my view, the task of the scholar is to learn, to criticize, and, wherever possible, to add to the store of valid knowledge."

"Novelty, originality, and creativity have no value if their products do not correspond to truth, to the contrary, they are harmful when they lead to false assertions.... We must separate our valid knowledge, that is documentable and objective from our religious, political and ideological preferences."

"Еvery intellectual in emigration, without exception, is damaged."