The Bible clearly teaches us that the real issues of life are spiritual and are really matters of the heart, the inner man. Although we find it hard to believe, the truth is, “the heart is desperately wicked above all things and only God can search it and find its cure” (Jeremiah 17:9). I think the basic reason why Christian faith meets with opposition in the world and even finds resistance in our own hearts is that true saving faith always brings with it the reshaping of our heart and mind so that it is no longer we who live but Christ in us. Piper