Genesis 18:13 - Exposition

And the Lord said unto Abraham, Wherefore did Sarah laugh ,—a question which must have convinced Abraham of the Speaker's omniscience. Not only had he heard the silent, inaudible, inward cachinnation of Sarah's spirit, but he knew the tenor of her thoughts, and the purport of her dubitations— saying, Shall I of a surely bear a child, whilst (literally, and I ) am old? Sarah's mental cogitations clearly showed that the temporary obscuration of her faith proceeded from a strong realization of the weakness of nature, which made conception and pregnancy impossible to one like her, who was advanced in years; and accordingly her attention, as well as that of her husband, was directed to the Divine omnipotence as the all-sufficient guarantee for the accomplishment of the promise.