That Abraham's faith triumphed over exceptional difficulties and enabled him to do what no other motive would have been strong enough to accomplish, there is therefore no call to assert. During his after-life his faith was severely tried, but the mere abandonment of his country in the hope of gaining a better was the ordinary motive of his day. It was the _ground_ of this hope, the belief in God, which made Abraham's conduct original and fruitful. That sufficient inducement was presented to him is only to say that God is reasonable. There is always sufficient inducement to obey God; because life is reasonable. No man was ever commanded or required to do anything which it was not for his advantage to do. Sin is a mistake. But so weak are we, so liable to be moved by the things present to us and by the desire for immediate gratification, that it never ceases to be wonderful and admirable when a sense of duty enables a man to forego present advantage and to believe that present loss is the needful preliminary of eternal gain.
Abraham's faith is chosen by the author of the Epistle to the Hebrews as an apt illustration of his definition of Faith, that it is "the substance of things hoped for, the evidence of things not seen." One property of faith is that it gives to things future and which are as yet only hoped for all the reality of actual present existence. Future things may be said to have no existence for those who do not believe in them. They are not taken into account. Men do not shape their conduct with any reference to them. But when a man believes in certain events that are to be, this faith of his lends to these future things the reality, the "substance" which things actually existing in the present have. They have the same weight with him, the same influence upon his conduct.
Without some power to realize the future and to take account of what is to be as well as of what already is, we could not carry on the common affairs of life. And success in life very greatly depends on foresight, or the power to see clearly what is to be and give it due weight. The man who has no foresight makes his plans, but being unable to apprehend the future his plans are disconcerted. Indeed it is one of the most valuable gifts a man can have, to be able to say with tolerable accuracy what is to happen and what is not; to be able to sift rumours, common talk, popular impressions, probabilities, chances, and to be able to feel sure what the future will really be; to be able to weigh the character and commercial prospects of the men he deals with, so as to see what must be the issue of their operations and whom he may trust. Many of our most serious mistakes in life arise from our inability to imagine the consequences of our actions and to forefeel how these consequences will affect us.
Now faith largely supplies the want of this imaginative foresight. It lends substance to things future. It believes the account given of the future by a trustworthy authority. In many ordinary matters all men are dependent on the testimony of others for their knowledge of the result of certain operations. The astronomer, the physiologist, the navigator, each has his department within which his predictions are accepted as authoritative. But for what is beyond the ken of science no faith in our fellow-men avails. Feeling that if there is a life beyond the grave, it must have important bearings on the present, we have yet no data by which to calculate what will then be, or only data so difficult to use that our calculations are but guesswork. But faith accepts the testimony of God as unhesitatingly as that of man and gives reality to the future He describes and promises. It believes that the life God calls us to is a better life, and it enters upon it. It believes that there is a world to come in which all things are new and all things eternal; and, so believing, it cannot but feel less anxious to cling to this world's goods. That which embitters all loss and deepens sorrow is the feeling that this world is all; but faith makes eternity as real as time and gives substantial existence to that new and limitless future in which we shall have time to forget the sorrows and live past the losses of this present world.