"Faithless Heart" is a downtempo song that caused eyebrows to raise when it was released in the late 1980s.
The very personal lyrics detail Grant's doubts about her marriage with then-husband Gary Chapman.
Such messages of doubt had been a central theme of Grant's music up to the point and since, but the lyrics that some perceived as hinting at divorce or adultery made some in the Christian community uneasy.
Chapman had battled drug addiction in the 1980s but it was "Faithless Heart" that first clued the public into the problems that Grant faced at home.
The second disc of that re-release featured a new recording of "Faithless Heart" by Amy Grant with Michael W. Smith on the electric piano.
The disc also featured a new introduction track with Grant and Smith discussing how to arrange the song.