The fact that astronomies change while the stars abide is a true analogy of every realm of human life and thought, religion not least of all. No existent theology can be a final formulation of spiritual truth.

Prayer opens our lives for God so his will can be done in and through us, because in true prayer we habitually put ourselves into the attitude of willingness to do whatever God wills.

The stars are not so strange as the mind that studies them, analyzes their light, and measures their distance.

While each of us ... has depressed hours, none of us needs to be a depressed person.

The finest quality of our characters do not come from trying but from the mysterious and yet most effective capacity to be inspired.

Life is like a library owned by the author. In it are a few books which he wrote himself, but most of them were written for him.

Every great scientist becomes a great scientist because of the inner self-abnegation with which he stands before truth, saying: "Not my will, but thine, be done." What, then, does a man mean by saying, Science displaces religion, when in this deep sense science itself springs from religion?