So far, one may be tempted to say, no very unusual faith was required. Many a poor girl has followed a weakly brother or a dissipated father to Australia or the wild west of America; many a lad has gone to the deadly west coast of Africa with no such prospects as Abraham. For Abraham had the double prospect which makes migration desirable. Assure the colonist that he will find land and have strong sons to till and hold and leave it to, and you give him all the motive he requires. These were the promises made to Abraham--a land and a seed. Neither was there at this period much difficulty in believing that both promises would be fulfilled. The land he no doubt expected to find in some unoccupied territory. And as regards the children, he had not yet faced the condition that only through Sarah was this part of the promise to be fulfilled.
But the peculiarity in Abraham's abandonment of present certainties for the sake of a future and unseen good is, that it was prompted not by family affection or greed or an adventurous disposition, but by faith in a God Whom no one but himself recognised. It was the first step in a life-long adherence to an Invisible, Spiritual Supreme. It was that first step which committed him to life-long dependence upon and intercourse with One Who had authority to regulate his movements and power to bless him. From this time forth all that he sought in life was the fulfilment of God's promise. He staked his future upon God's existence and faithfulness. Had Abraham abandoned Charran at the command of a widely ruling monarch who promised him ample compensation, no record would have been made of so ordinary a transaction. But this was an entirely new thing and well worth recording, that a man should leave country and kindred and seek an unknown land under the impression that thus he was obeying the command of the unseen God. While others worshipped sun, moon, and stars, and recognised the Divine in their brilliance and power, in their exaltation above earth and control of earth and its life, Abraham saw that there was something greater than the order of nature and more worthy of worship, even the still small voice that spoke within his own conscience of right and wrong in human conduct, and that told him how his own life must be ordered. While all around him were bowing down to the heavenly host and sacrificing to them the highest things in human nature, he heard a voice falling from these shining ministers of God's will, which said to him, "See thou do it not, for we are thy fellow-servants; worship thou God!" This was the triumph of the spiritual over the material; the acknowledgment that in God there is something greater than can be found in nature; that man finds his true affinity not in the things that are seen but in the unseen Spirit that is over all. It is this that gives to the figure of Abraham its simple grandeur and its permanent significance.
Under the simple statement "The Lord said unto Abram, Get thee out of thy country," there are probably hidden years of questioning and meditation. God's revelation of Himself to Abram in all probability did not take the determinate form of articulate command without having passed through many preliminary stages of surmise and doubt and mental conflict. But once assured that God is calling him, Abraham responds quickly and resolutely. The revelation has come to a mind in which it will not be lost. As one of the few theologians who have paid attention to the method of revelation has said: "A Divine revelation does not dispense with a certain character and certain qualities of mind in the person who is the instrument of it. A man who throws off the chains of authority and association must be a man of extraordinary independence and strength of mind, although he does so in obedience to a Divine revelation; because no miracle, no sign or wonder which accompanies a revelation can by its simple stroke force human nature from the innate hold of custom and the adhesion to and fear of established opinion; can enable it to confront the frowns of men, and take up truth opposed to general prejudice, except there is in the man himself, who is the recipient of the revelation, a certain strength of mind and independence which concurs with the Divine intention."