How do we know Christ's mercy is sufficient?

The sufficiency of Christ's mercy is demonstrated in Romans 5:8, where it states that while we were still sinners, Christ died for us. His willingness to bear our sins and the full weight of our punishment signifies that His mercy is more than sufficient. Furthermore, Ephesians 2:4-5 reflects God's rich mercy and love, affirming that it is by grace we are saved. Thus, the very act of Christ's sacrifice validates His mercy, offering hope and assurance that we are eternally secure in Him.