He fashioneth their hearts alike - That is, one as well as another; or, one as really as another. No one is exempt from his control, or from all that is implied in the word "fashioneth." The meaning is not that their hearts are made to "resemble" each other, or to be "like" each other, whether in goodness or in wickedness - but that all alike "are" made by him. The idea in the word "fashioneth" here is not that of "creating," in the sense that He "makes" the heart by his own power what it is, whether good or bad; but that, as he has "formed" the hearts of all people, he must see what is in the heart, or must behold all the purposes and thoughts of people. The Maker of the human heart must understand what is in it; and, therefore, He must have a clear understanding of the purposes and designs of human beings. This idea is carried out in the latter member of the sentence, "he considereth all their works," and is substantially the same as in the expression Psalms 94:9, "He that planted the ear, shall he not hear? He that formed the eye, shall he not see?"
He considereth all their works - He understands all that they do; he marks, or attends to, all that is done by them. The purpose here is to state the universal sovereignty of God. He made all things; He presides over all things; He sees all things; He is the source of safety and protection to all.
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