“As far as I'm concerned, I prefer silent vice to ostentatious virtue.”

“Yes, we have to divide up our time like that, between our politics and our equations. But to me our equations are far more important, for politics are only a matter of present concern. A mathematical equation stands forever. ”

“If I were to remain silent, I'd be guilty of complicity.”

“I do not believe in the immortality of the individual, and I consider ethics to be an exclusively human concern without any superhuman authority behind it.”

“I believe in Spinoza's God, who reveals Himself in the lawful harmony of the world, not in a God who concerns Himself with the fate and the doings of mankind... to Rabbi Herbert Goldstein (1929)”

“As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.”

“It is not that I'm so smart. But I stay with the questions much longer.”