But the patience of Isaac was quite as remarkable as the faith of Abraham. He was now forty years old, and if, as he had been told, the great aim of his life, the great service he was to render to the world, was bound up with the rearing of a family, he might with some reason be wondering why circumstances were so adverse to the fulfilment of this vocation. Must he not have been tempted, as his father had been, to take matters into his own hand? Fathers are perhaps too scrupulous about telling their sons instructive passages from their own experience; but when Abraham saw Isaac exercised and discomposed about this matter, he can scarcely have failed to strengthen his spirit by telling him something of his own mistakes in life. Abraham must have seen that everything depended on Isaac's conduct, and that he had a very difficult part to play. He himself had been supernaturally encouraged to leave his own land and sojourn in Canaan; on the other hand, by the time Jacob grew up, the idea of the promised land had become traditional and fixed; though even Jacob, had he found Laban a better master, might have permanently renounced his expectations in Canaan. But Isaac enjoyed the advantages neither of the first nor of the third generation. The coming into Canaan was not his doing, and he saw how little of the land Abraham had gained. He was under strong temptation to disbelieve. And when he measured his condition with that of other young men, he certainly required unusual self-control. And to every one who would urge, Youth is passing, and I am not getting what I expected at God's hand; I have not received that providential leading I was led to expect, nor do I find that my life is made simpler; it is very well to tell me to wait, but life is slipping away, and we may wait too long--to every one whose heart urges such murmurs, Abraham through Isaac would say: But if you wait for God you get something, some positive good, and not some mere appearance of good; you at last do get begun, you get into life at the right door; whereas if you follow some other way than that which you believe God wishes to lead you in, you get nothing.