How does God's grace keep us humble according to the sermon?

In the sermon, it is articulated that God's grace serves to humble His people by constantly reminding them of their weaknesses. Just as God whittled down Gideon's army from thousands to just 300, He helps us see that our strength is found not in ourselves but in Him. Romans 12:3 cautions us not to think more highly of ourselves than we ought. Acknowledging our limitations leads us to rely on God's grace, fostering a heart of gratitude and dependence on Christ, who is our source of strength.