I thought of the fate of Descartes' famous formulation: man as 'master and proprietor of nature.' Having brought off miracles in science and technology, this 'master and proprietor' is suddenly realizing that he owns nothing and is master neither of nature (it is vanishing, little by little, from the planet), nor of History (it has escaped him), nor of himself (he is led by the irrational forces of his soul). But if God is gone and man is no longer master, then who is master? The planet is moving through the void without any master. There it is, the unbearable lightness of being.