History is the only laboratory we have in which to test the consequences of thought.

Faith comes to intelligence as a light that overflows it with joy and inspires it with a certitude that does away with question.

Radiance belongs to being considered precisely as beautiful: it is, in being, that which catches the eye, or the ear, or the mind, and makes us want to perceive it again

Let us ... quietly accept our times, with the firm conviction that just as much good can be done today as at any time in the past, provided only that we have the will and the way to do it.

Why are there organized beings? Why is there something rather than nothing? Here again, I fully understand a scientist who refuses to ask it. He is welcome to tell me that the question does not make sense. Scientifically speaking, it does not. Metaphysically speaking, however, it does. Science can account for many things in the world; it may some day account for all that which the world of phenomena actually is. But why anything at all is, or exists, science knows not, precisely because it cannot even ask the question.

To minds tormented by the divine thirst, it is useless to offer the most certain knowledge of the laws of numbers and the arrangement of the universe

Humans feel at home in a world of things, whose essences and laws it can grasp and define in terms of concepts; but shy and ill at ease in a world of existences, because to exist is an act, not a thing.