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.