The tendency of everything, even the best on this earth, is to make us forget that we do not belong to it. You may think that very sweeping; but I repeat, it does not matter what it is, even the best thing that belongs to this world has the tendency to make us forget that we do not belong to it. Thus everything becomes a test to us; mercies test us, favors test us, and we find that we cannot trust ourselves even for a moment.