“He recognized with absolute certainty the empty fragility of even the noblest theorizings as compared with the definitive plenitude of the smallest fact grasped in its total, concrete reality.”

“So many things which once had distressed or revolted him — the speeches and pronouncements of the learned, their assertions and their prohibitions, their refusal to allow the universe to move — all seemed to him now merely ridiculous, non-existent, compared with the majestic reality, the flood of energy, which now revealed itself to him: omnipresent, unalterable in its truth, relentless in its development, untouchable in its serenity, maternal and unfailing in its protectiveness.”

“Blessed be you, mighty matter, irresistible march of evolution, reality ever newborn; you who, by constantly shattering our mental categories, force us to go ever further and further in our pursuit of the truth.”

“The time has come to realise that an interpretation of the universe—even a positivist one—remains unsatisfying unless it covers the interior as well as the exterior of things; mind as well as matter. The true physics is that which will, one day, achieve the inclusion of man in his wholeness in a coherent picture of the world.”

“If there were no internal propensity to unite, even at a prodigiously rudimentary level — indeed in the molecule itself — it would be physically impossible for love to appear higher up, with us, in hominized form. . . . Driven by the forces of love, the fragments of the world seek each other so that the world may come into being.”

“It seems to me that the Russian prestige is declining and that America holds in its hands the immediate future of the world: as long as America knows how to develop the sense of the earth at the same time as her sense of liberty." [Written from Peking, October 1945, on the eve of departure, after having been stuck there since the war began.]”

“Joy is the infallible sign of the presence of God.”