It was by faith that Sarah, too, received power to conceive and to bear a son, although she was beyond the age for it, for she believed that he who gave the promise could be absolutely relied upon. So from one man, and he a man whose body had lost its vitality, there were born descendants, as many as the stars of the sky in multitude, as countless as the sand upon the seashore.

The story of the promise of a son to Abraham and Sarah is told in Genesis 17:15-22; Genesis 18:9-15; Genesis 21:1-8. Its wonder is that both Abraham and Sarah were ninety years old, long past the age of begetting or bearing a child; and yet, according to the old story, that promise was made and came true.

The reaction of Abraham and Sarah to the promise of God followed a threefold course.

(i) It began with sheer incredulousness. When Abraham heard the promise he fell upon his face and laughed (Genesis 17:17). When Sarah heard it she laughed within herself (Genesis 18:12). On first hearing of the promises of God, the human reaction often is that this is far too good to be true.

"How thou canst think so well of us,

And be the God thou art,

Is darkness to my intellect,

But sunshine to my heart."

There is no mystery in all creation like the love of God. That he should love men and suffer and die for them is something that staggers us into sheer incredulity. That is why the Christian message is the gospel, good news; it is news so good that it is almost impossible to believe it true.

(ii) It passed into dawning realization. After the incredulity came the dawning realization that this was God who was speaking; and God cannot lie. The Jews used to lay it down as a primary law for a teacher that he must never promise his pupils what he was unwilling or unable to perform; to do so would be to accustom the pupils thus early to the broken word. When we remember that the one who makes the promise is God, there comes the realization that however astonishing that promise may be, it must none the less be true.

(iii) It culminated in the ability to believe in the impossible. That Abraham and Sarah should have a child, humanly speaking, was impossible. As Sarah said: "Who would have said that Sarah would suckle children?" (Genesis 21:7). But, by the grace and the power of God, the impossible became true. There is something here to challenge and uplift the heart of every man. Cavour said that the first essential of a statesman is "the sense of the possible." When we listen to men planning and arguing and thinking aloud, we get the impression of a vast number of things in this world which are known to be desirable but dismissed as impossible. Men spend the greater part of their lives putting limitations on the power of God. Faith is the ability to lay hold on that grace which is sufficient for all things in such a way that the things which are humanly impossible become divinely possible. With God all things are possible, and, therefore, the word impossible has no place in the vocabulary of the Christian and of the Christian Church.

SOJOURNERS AND STRANGERS (Hebrews 11:13-16)

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Old Testament