After a newfound relationship with Jesus Christ in the summer of 1977, David and the Giants sought to change the very foundation of the group from the secular rock scene to a different style of Christian music. Through 1997 the original band and other musicians produced 17 inspiring contemporary Christian Rock albums.

Greg X.Volz's first full-time album with Petra, Washes Whiter Than, came in 1979 and therein came one of the most prolific periods of the legendary band. Volz remained the lead singer until 1985 when he left to pursue a solo career. Volz released his first solo effort, titled The River is Rising in 1986 under Myrrh Records. He followed it with three other moderately successful albums. During this time, he also toured with Joe English in a band called Pieces of Eight.