because of what he has done

confidently and joyfully

What is involved in genuine repentance or conversion?
Two things: the dying away of the old self, and the rising-to-life of the new.

What is the dying-away of the old self?
To be genuinely sorry for sin and more and more to hate and run away from it.

What is the rising-to-life of the new?
Wholehearted joy in God through Christ and a love and delight to live according to the will of God by doing every kind of good work.

Therefore, since we have been made right in God’s sight by faith, we have peace with God because of what Jesus Christ our Lord has done for us. Because of our faith, Christ has brought us into this place of undeserved privilege where we now stand, and we confidently and joyfully look forward to sharing God’s glory.
Romans 5:1-2 (NLT)

(questions and answers taken from the Heidelberg Catechism, 1563, questions 88-90)