And so, resisting the temptation to wallow in artistic remorse, I prefer to leave both well and ill alone and to think about something else

This really revolutionary revolution is to be achieved, not in the external world, but in the souls and flesh of human beings.

Some of the greatest advances in mathematics have been due to the invention of symbols, which it afterwards became necessary to explain; from the minus sign proceeded the whole theory of negative quantities.

Good is a product of the ethical and spiritual artistry of individuals; it cannot be mass-produced.

This growing poverty in the midst of growing population constitutes a permanent menace to peace. And not only to peace, but also to democratic institutions and personal liberty For overpopulation is not compatible with freedom.

Liberties are not given, they are taken.

The world is an illusion, but an illusion which we must take seriously.