Notwithstanding the divine assurance, that the posterity of Abraham should become a great nation, and possess the land of Canaan, Sarah begins to think that there is no probability of her becoming a mother. Ten years had elapsed, and no child was born. Reflecting on her advanced period of life, and incapable of an implicit reliance upon the power of God, she requested Abraham to take Hagar, her Egyptian handmaid, in order that she might obtain children by her. It is scarcely possible to imagine a proposal more calculated to subvert the comfort of her family, or more illustrative of an unbelieving spirit. She could not rely upon the slow but certain operations of a superintending Providence to fulfil those promises which had been given; although a humble faith would have cherished confidence in his word. He who has filled the volume of inspiration with "exceeding great and precious promises," will assuredly accomplish them, notwithstanding every apparent impediment. Omnipotence marches forward with a steady, undeviating step, to its predestined purpose; and that infinite wisdom which originally planned the future, can never be frustrated or confused by any contingencies or vicissitudes; for no possible event can occur which was not fully anticipated at the moment when the promise was given. Sarah was not only under the influence of distrust, but of inordinate desire. She was impatient for one of those prime domestic comforts which it was seen fit at present to deny her; and because the time which had elapsed, exceeded her calculations of probability, she took upon herself to devise a plan to hasten the accomplishment of her wishes. Let us beware of an undue eagerness after the possession of any temporal enjoyment. It will not only produce distrust, but, probably, precipitate us into irregular means of gratifying our wishes. "Inordinate desires commonly produce irregular endeavours. If our wishes be not kept in submission to God's providence, our pursuits will scarcely be kept under the restraints of his precepts." It is truly surprising, that the father of the faithful should listen to this insinuating request. Possibly he thought that, as Sarah was not distinctly mentioned in the promise, Hagar might become the parent of the promised seed; and by this specious pretence, being anxious for a son, he was induced to comply. We are easily persuaded, when our own inclinations already concur with a proposal; and even good men are very liable to misinterpret the intimations of Providence, whenever they consult their own feelings rather than the word of God.