How do we know that salvation is sure and ordered?

2 Samuel 23:5 highlights that the covenant of salvation is not dependent on human failure but is ordered in all things and sure, indicating that it is fully and perfectly decreed by God. The assurance of this covenant comes from the fact that it is grounded in God's sovereignty and the redemptive work of Christ, who serves as the surety for those He came to save. Thus, believers can trust that their salvation is secured and will never be undone, as it rests on the faithfulness of God rather than the fickleness of man.