 | But the LORD said to Samuel, "Do not consider his appearance or his height, for I have rejected him. The LORD does not look at the things man looks at. Man looks at the outward appearance, but the LORD looks at the heart." |
 | 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. |
God gave Samuel a new perspective. In these verses, God tells Samuel to pick a young David to be the future king, not one of David's seven older and arguably more qualified brothers.
While man often judges on outward appearance, God searches the heart.