These fifty years, with God and angels as teachers, reveal to us, as no other period does, the results of true education, and merit careful attention. If the workings of the Spirit ever wrought changes in the human heart, those changes came to Abraham. It is not strange that when God called the first time the voice seemed far away, and but partially awoke the slumbering soul. As if in a dream, he, his father, his nephew, and his wife, broke away from earthly ties and from the beautiful Chaldean plains, where luxury and learning were daily things of life, and journeyed toward the hill country. [Sidenote: How God taught faith] It has been stated before that God teaches by the enunciation of principles, or universal laws, and the spirit which comes by faith enlightens the senses that they may grasp the illustrations of these laws in the physical world. That is heaven’s method of teaching the angelic throng, and it was the method applied before the fall. With Abraham the case was at the beginning far from ideal. Here was a pupil lacking faith. How should he be taught the wisdom of the Eternal? God leads in a mysterious way. As Christ lived His visible life, because the eye of faith was blind in Israel, so, in the time of Abraham, God taught inductively, as He now says the heathen are to be taught. To him who had no faith, God came visibly at first, and, leading step by step, developed a faith which before his death enabled Abraham to grasp eternal principles of truth if God but spoke. In Ur, God said, “I will make of thee a great nation, and I will bless thee, and will make thy name great.” Years passed, age crept on, and still there was no heir. Could he have mistaken the voice which bade him turn his face toward Canaan, and promised to him and his descendants all the land from the “great river, the river Euphrates, ... unto the great sea toward the going down of the sun”? “And Abraham said, Lord God, what wilt Thou give me, seeing I go childless? Shall it be that my steward, Eliezer, shall become my heir? Shall he be the child of promise? Behold, to me Thou hast given no seed: and, lo, one born in my house is mine heir.”[16] This was man’s way of working out a promise made by the Maker of the universe. Have _we_ passed beyond this elementary lesson of faith? Can _we_ grasp God’s promise of faith, and, with no fear or thought, leave results with Him who knows? No, Abraham; think not that heaven is limited by the line which bounds thy horizon. “This shall not be thine heir; but he that shall come forth out of thine own bowels shall be thine heir.” And, standing under the starry canopy of heaven, Abraham’s soul grasped the power of the Creator. He himself to be a father! His face lighted with a holy joy as he related to Sarai his experience with God.