How do we know Christ is sufficient for salvation?

The doctrine of Christ's sufficiency is grounded in Scripture, particularly Colossians 2:9-10, which teaches that in Christ resides the fullness of the Godhead. This means that Christ alone meets all the requirements for salvation. He is not merely a part of the equation; He is the center. When we trust in Him, we are said to be complete in Him, affirming that nothing else—be it our works or rituals—can contribute to our standing before God. This is a rejection of any teaching suggesting that additional works or aids are needed for salvation.