How do we know God is not slack concerning His promise?

Understanding God's character is key to trusting in His promises. In 2 Peter 3:9, we are reassured that the Lord is not slack concerning His promise, as His immutability guarantees His faithfulness. Unlike humans, who fluctuate and change with circumstances, God is consistent and sovereign over all creation. The passage illustrates that God operates on a divine timetable, and His long-suffering to His people is not a sign of delay but a demonstration of His patience and desire for all His chosen people to come to repentance. His sovereignty ensures that all events correspond to His will and purpose.