1 Samuel 16:7

But the Lord said unto Samuel, giving an answer to his spirit, Look not on his countenance or on the height of his stature, on the fact that he was a handsome, stalwart young man; because I have refused him; for the Lord seeth not as man seeth, He has different standards of judgment; for man looketh on the outward appearance, judging from what he can see, but the Lord looketh on the heart, judging by the disposition of the soul, proving the heart and the reins. This is a general truth which applies to the relation of God to men at all times. God, knowing the inward thoughts of men, is unfailing in His judgment.