How do we know God's long-suffering is a part of His plan?

Peter emphasizes in 2 Peter 3:9 that God's long-suffering is directed towards His beloved, not wanting any of them to perish but for all to come to repentance. This illustrates God's sovereign grace, showing that His patience is a part of His redemptive plan for His people. God's long-suffering allows time for His chosen ones to respond to His grace, highlighting His desire for their salvation. It serves as both a warning to the ungodly and a comfort to the elect, assuring them that God is actively working through time to accomplish His purposes.