The gospel is not just the A-B-C's but the A-Z of Christianity. The gospel is not just the minimum required doctrine necessary to enter the kingdom, but the way we make all progress in the kingdom.
Timothy Keller[T]he main problem in life is sin, and the only solution is God and his grace. The alternative to this view is to identify something besides sin as the main problem with the world and something besides God as the main remedy. That demonizes something that is not completely bad, and makes an idol out of something that cannot be the ultimate good.
Timothy KellerThe Gospel does not promise you better life circumstances; it promises you a better life.
Timothy Keller