Why is it important for Christians to know their Gospel?

Understanding and personally knowing the true Gospel is crucial for Christians because it gives them confidence in their salvation and a clear view of God's redemptive plan. The Gospel informs believers of who God is, who Christ is, and what He has done for them, which is essential for spiritual growth and assurance. In 1 Corinthians 15, Paul highlights that the Gospel is grounded in the Scriptures, showing that it is not based on individual experiences or feelings. This grounding results in a faith that glorifies God and rests on His promises rather than human efforts.