“There is no doubt that here below matter and evil exercise 'all the causality which belongs to them'; the spectacle of the innumerable horrors of history is enough to prove that the kingdom of God is not of this world (does not Scripture describe the devil as the prince of this world?). Nevertheless God remains mysteriously present in creation: without in any way changing the calamities which weigh upon us, his grace plays upon the laws of gravity like the sun's rays in the clouds.”