The Lord spake by secret inspiration. The height of his stature; whereby thou wast once deceived in Saul, 1 Samuel 10:23,24, and therefore shouldst not now be deceived a second time. Man looketh on the outward appearance; men value men by their outsides. The Lord looketh on the heart; God esteems of men by the goodness of their hearts, and hath now proceeded by that rule in the choice of a king, and would have done so before, if the people's sinful desires had not provoked him to give them a bad king.
Related Commentaries of 1 Samuel 16:7
1 Samuel 16:7
7 But the LORD said unto Samuel, Look not on his countenance, or on the height of his stature; because I have refused him: for the LORD seeth not as man seeth; for man looketh on the outward appearance, but the LORD looketh on the heart.