Gospel repentance is not a little hanging down of the head. It's a working of the heart until your sin becomes more odious to you than any punishment for it.
What the heart liketh best, the mind studieth most.
If Christ has once possessed the affections, there is no dispossessing of him again. A fire in the heart overcomes all fires without.
Therefore, when we find our heart inflamed with love to God, we may know that God hath shined upon our souls in the pardon of sin; and proportionally to our measure of love is our assurance of pardon. Therefore we should labour for a greater measure thereof, that our hearts may be the more inflamed in the love of God.
If we would make it evident that our conversion is sound, we must loathe and hate sin from the heart.