How do we know that God sees the heart's motive?

In Jeremiah 17:10, the Lord states, "I, the Lord, search the heart and test the mind," affirming His sovereign ability to discern our true intentions. Unlike humans who may focus on the external actions, God looks deeper into the motives that drive them. This is echoed throughout Scripture, where the emphasis is continually placed on the heart as the source of our actions. Because of this divine insight, it is vital that believers ensure their actions spring forth from a heart that seeks to glorify God.