Now this obstinate disregard of the repeated lessons of experience is too remarkable a habit of life to be reckoned as a mere accident. There must be some adequate causes to account for it. In the first place, it testifies with singular force to the vitality of what we may call the faculty of hope itself. Disappointment does not kill the tendency to reach forth to the future, because this tendency comes from within, and is not a mere response to impressions. In persons of a sanguine temperament this may be taken to be a constitutional peculiarity; but it is too widespread to be disposed of as nothing more than a freak of nature. It is rather to be considered an instinct, and as such a part of the original constitution of man. How then has it come to be? Must we not attribute the native hopefulness of mankind to the deliberate will and purpose of the Creator? But in that case must we not say of this, as we can say with certainty of most natural instincts: He who has given the hunger will also supply the food with which to satisfy it? To reject that conclusion is to land ourselves in a form of pessimism that is next door to atheism. Schopenhauer rests the argument by means of which he thinks to establish a pessimistic view of the universe largely on the delusiveness of natural instincts which promise a satisfaction never attained; but in reasoning in this way he is compelled to describe the supreme Will that he believes to be the ultimate principle of all things as a non-moral power. The mockery of human existence to which his philosophy reduces us is impossible in view of the Fatherhood of God revealed to us in Jesus Christ. Shelley, contrasting our fears and disappointments with the "clear keen joyance" of the skylark, bewails the fact that
"We look before and after, And pine for what is not."
If this is the end of the matter, evolution is a mocking progress, for it leads to the pit of despair. If the large vision that takes in past and future only brings sorrow, it would have been better for us to have retained the limited range of animal perceptions. But faith sees in the very experience of disappointment a ground for fresh hope. The discovery that the height already attained is not the summit of the mountain, although it appeared to be when viewed from the plain, is a proof that the summit is higher than we had supposed. Meanwhile, the awakening of desires for further climbing is a sign that the disappointments we have experienced hitherto are not occasions for despair. If, as Shelley goes on to say--
"Our sweetest songs are those that tell of saddest thought,"
the sadness cannot be without mitigation, for there must be an element of sweetness in it from the first; and if so this must point to a future when this sadness itself shall pass away. The author of the Epistle to the Hebrews argues on these lines when he draws the conclusion from the repeated disappointments of the hopes of Israel in conjunction with the repeated promises of God that "there remaineth therefore a rest for the people of God."[258] Instincts are God's promises written in the Book of Nature. Seeing that our deepest instincts are not satisfied by any of the common experiences of life, they must point to some higher satisfaction.
[258] Heb. iv. 9.
Here we are brought to the explanation of the disappointment itself. We must confess, in the first instance, that it arises from the perverse habit of looking for satisfaction in objects that are too low, objects that are unworthy of human nature. This is one of the strongest evidences of a fall. The more mind and heart are corrupted by sin the more will hope be dragged down to inferior things. But the story does not end at this point. God is educating us through illusions. If all our aspirations were fulfilled on earth we should cease to hope for what was higher than earth. Hope is purged and elevated by the discovery of the vanity of its pursuits.