Dane Ortlund, editor at Crossway, has this to say about why there is a need for so many books about the gospel:
Because you’re going to roll out of bed tomorrow a functional Pharisee. The instincts beneath your instincts, the impulses way down deep inside you, are law, not gospel. A good night’s sleep, not a heretical sermon, is all it takes to forget the gospel of grace.
Read the rest here.