But the thing a man does practically believe (and this is often enough without asserting it even to himself, much less to others); the thing a man does practically lay to heart, and know for certain, concerning his vital relations to this mysterious Universe, and his duty and destiny there, that is in all cases the primary thing for him, and creatively determines all the rest. That is his religion; or, it may be, his mere scepticism and no-religion: the manner it is in which he feels himself to be spiritually related to the Unseen World or No-World; and I say, if you tell me what that is, you tell me to a very great extent what the man is, what the kind of things he will do is.
Thomas Carlyle