Drew:As a Calvinist I would of course agree that it's all of God. But while I accept the "sovereignty of God", I also tend to take the second perspective of "Man's responsibility", and hence my comments were more from the experiential side of the coin.
In that respect we're on the same wavelength, in that I hold the "reaction of the heart" to be a spontaneous result of grace, rather than an "act" of the human will.