Money, it turned out, was exactly like sex, you thought of nothing else if you didn't have it and thought of other things if you did. James Baldwin
The universe is a thought of God. Friedrich Schiller
True love makes the thought of death frequent, easy, without terrors; it merely becomes the standard of comparison, the price one would pay for many things. Stendhal
They wonder much to hear that gold, which in itself is so useless a thing, should be everywhere so much esteemed, that even men for whom it was made, and by whom it has its value, should yet be thought of less value than it is. Thomas More
Death is repose, but the thought of death disturbs all repose. Cesare Pavese
A set is a Many that allows itself to be thought of as a One. Georg Cantor