An interesting quote from Charles Spurgeon on repentance and faith:
Repentance will never allow faith to strut, even if it had a mind to do so. Faith cheers repentance and repentance sobers faith. The two go well together. Faith looks to the Throne and repentance loves the Cross. When faith looks most rightly to the Second Advent, repentance forbids its forgetting the First Advent. When faith is tempted to climb into presumption, repentance calls it back to sit at Jesus’ feet.~Charles Spurgeon (Two Essential Things #2073)
Never try to separate these dear companions which minister more sweetly to one another than I have time to tell. That conversion which is all joy and lacks sorrow for sin, is very questionable. I will not believe in that faith which has no repentance with it any more than I would believe in that repentance which left a man without faith in Jesus. Like the two cherubs which stood gazing down upon the Mercy Seat, so stand these two inseparable Graces, and none must dare to remove the one or the other.