Sin carries a just penalty that must be paid, and no sinner can bear it and live. The sermon presents Christ as the one who took that penalty on Himself at the cross, satisfying the demand of justice so that guilty sinners could be forgiven. His blood, shed once, is what makes peace between God and those He redeems.
Because Christ has already borne the penalty, believers do not have to live under the fear of judgment; instead they wait for His return in hope, knowing that when He appears they will be made like Him. The sermon points hearers back to the finished work of the cross as their only ground of confidence before God.