It is only in marriage with the world that our ideals can bear fruit
 Bertrand Russell, Mysticism and Logic and Other Essays (1910). copy citation

Context

“It is with this impartial temper that the mystic's apparent insight into a higher reality and a hidden good has to be combined if philosophy is to realise its greatest possibilities. And it is failure in this respect that has made so much of idealistic philosophy thin, lifeless, and insubstantial. It is only in marriage with the world that our ideals can bear fruit: divorced from it, they remain barren. But marriage with the world is not to be achieved by an ideal which shrinks from fact, or demands in advance that the world shall conform to its desires. Parmenides himself is the source of a peculiarly” source