To remain silent and indifferent is the greatest sin of all.

I'll tell you what: I believe mysticism is a very serious endeavor. One must be equipped for it.

I'm not a political person. I usually beware of political persons. I know many, but I'm not one of them. I have no political ambitions.

It always hurts when you lose a secret.

Perhaps some day someone will explain how, on the level of man, Auschwitz was possible; but on the level of God, it will forever remain the most disturbing of mysteries.

I think that human beings are capable of the worst things possible.

The opposite of love is not hate, it's indifference. The opposite of art is not ugliness, it's indifference. The opposite of faith is not heresy, it's indifference. And the opposite of life is not death, it's indifference.