Why is the Gospel central to a Christian's life?

The Gospel is not merely a starting point for salvation; it is the ongoing life source for every believer. In the sermon, it is emphasized that both new and mature believers need to regularly hear the Gospel preached to maintain their spiritual health. The danger of drifting from the Gospel can lead to legalism or empty religious practices, which Paul warns against in 1 Timothy 4. Continual engagement with the Gospel leads to deeper conviction, ongoing repentance, and greater alignment with Christ's sanctifying work.