But even the Christian, for all this satisfying and hopeful conviction, does not know the meaning of the mystery of life, and if he is wise he does not pretend to. He has enough light to light him on his way, but there are a great many gaps in his knowledge. When he says, "One day we shall understand", he is by no means always uttering a pious platitude. Quite frequently he is voicing a solid conviction, a genuine facet of hope. At present his vision is severely limited, and that is probably just as well, if his sanity is to be preserved. But when he is free of the limitations of temporal life, he has every hope of being able to know as surely as he is at present known.