Why is certainty in salvation important for Christians?

Certainty in salvation is vital for Christians because it ensures that our relationship with God is not dependent on uncertain conditions or ongoing performance. As illustrated in 2 Timothy 1:12, Paul confidently claims, 'I know whom I have believed,' showing that true faith rests on the reliability of Christ's promise and His ability to keep us. This certainty removes the fear and doubt that can paralyze our spiritual life and replace it with peace and assurance, enabling us to fully embrace our identity as children of God without the burden of works-based righteousness.