What does God mean by saying He looks at the heart?

The phrase 'God looks at the heart' indicates that God values the inner character and motivations of individuals over their external actions or appearances. In 1 Samuel 16:7, this principle is highlighted when God instructs Samuel not to judge based on outward looks but to recognize the spiritual condition of the heart. This teaches Christians that genuine faith and devotion are matters of the heart, not merely external observance of religious practices. It emphasizes the need for continual inner transformation through the Holy Spirit, as believers are called to live in obedience and faithfulness from a heart that seeks God.