How do we know true salvation is permanent?

Scripture makes it clear that those who are genuinely redeemed by Christ cannot lose their salvation. Hebrews 9:26 states that Jesus, through His one-time sacrifice, has put away sin for His people. Those who are saved are grafted into Christ and become part of His body, signifying a permanent relationship (John 6:40). Furthermore, passages like 1 John 5:11 clarify that eternal life is found only in Him. This assurance is rooted in God's sovereignty and His commitment to keep His promises, giving believers confidence that their salvation cannot be undone.