The turning-point from the old thought to the new is this: We see that the imperative task set to every man is not to understand the universe plan, but to live his own life successfully. It will quite suffice for most of us if we can each one do justice to the possibilities of his own existence. Those possibilities are something more than breathing and eating, sleeping and waking, toil and rest. Among his possibilities each man hopes are included contentment, joy, peace. At least there must be possible for him some right conformity to the conditions in which he is placed, some noble and spiritual satisfaction, some imparting of good to his fellow creatures. There is for him some best way of life, which it is his business to find and to follow. And as he finds and follows it,--as he fills out the best possibilities of his own being,--so he must come into the truest relation possible for him with this whole mysterious frame of things we call the universe. As he is himself at his best, so he will get the best, the widest, the truest impression of the whole in which he is a part. This, then, is the rational and hopeful way of addressing the supreme problem,--the problem, for the individual and for mankind, of a happiness and a success which shall be rooted in the true nature of things and the real order of the universe. We are not to start with any supposed comprehension of the general plan, whether as revealed by miracle or thought out by wise men. We are simply to live our own lives according to the best knowledge we have, the highest examples we know, the most satisfying results of our own experience. And, with whatever discipline and enrichment this process of right living may bring us, we are to hold our whole natures open, attentive, percipient to the world about us, and accept whatever shall disclose itself. The two processes--right living and clear vision--blend constantly and intimately. We may distinguish them in our thoughts, but there is constant interplay between life and sight. The business of living,--how infinitely complex it is, how endlessly laborious, yet how simple and how sure! Its central principle, we may say, is the right fitting of one's self to his surroundings. Modern science has learned that for every creature the condition of success is adaptation to its environment. We may use that way of speaking to express the prime necessity of man. His environment is a vast complexity of material, social, and spiritual realities.