The most famous verse in the Bible: God so loved the world that He gave His only Son (John 3:16). The Lord would have been justified in condemning the human race long ago. He would have been within His rights to visit His rage upon the earth. But pity stays His hand. He waits patiently for us to repent.
Patience is the proof of love. The Sacred Heart of Christ is a bottomless well of patience. The Lord patiently submitted Himself to unjust men and then bore the bitterness of His Passion without complaint.