Rich Mullins was of the belief that conversion is not a once in done experience at a revival meeting or a single moment of repentance followed by the "sinner's prayer."  Rich believed as the Catholic Church teaches that conversion is an ongoing process which happens over a lifetime.

Conversion to Christ, the new birth of Baptism, the gift of the Holy Spirit and the Body and Blood of Christ received as food have made us "holy and without blemish," just as the Church herself, the Bride of Christ, is "holy and without blemish." Nevertheless the new life received in Christian initiation has not abolished the frailty and weakness of human nature, nor the inclination to sin that tradition calls, which remains in the baptized such that with the help of the grace of Christ they may prove themselves in the struggle of Christian life. This is the struggle of conversion directed toward holiness and eternal life to which the Lord never ceases to call us. Catechism of the Catholic Church 1422-1429

Here is what Rich Mullins said about conversion when being "interviewed" before a possible concert: 

It used to be I only got born again every year, about once a year. That was when I was going to camp you know you go every year and get born again again. Those of you who are young enough to go to camp and rededicate your life every year, keep doing it. Because by the time you get to college you’re gonna have to re-dedicate your life about every six months. Then you’ll graduate from college and it will become a quarterly thing. By the time you’re in your 40’s and 50’s you’ll do it about four times a day. (See Video Below)