What does the Bible say about God looking at the heart?

In 1 Samuel 16:7, God instructs Samuel not to choose a king based on physical appearance or stature, emphasizing that 'the Lord seeth not as man seeth; for man looketh on the outward appearance, but the Lord looketh on the heart.' This distinction highlights God's omniscience and His ability to perceive the true nature and intentions of individuals. Unlike humans, whose judgments can be flawed and superficial, God's assessment is profound and rooted in truth. This principle reminds believers that God’s choices do not align with societal standards or human expectations, and it calls us to reflect on the condition of our own hearts in our relationship with Him.