How do we know the sufficiency of Christ is true?

The sufficiency of Christ is a fundamental truth found throughout Scripture. In Colossians 2:9-10, we learn that in Christ dwells all the fullness of the Godhead, and believers are made complete in Him. This implies that everything necessary for life and godliness is found in Christ alone. The historic Reformed perspective emphasizes that nothing can be added to Christ for salvation; His righteousness is fully sufficient.

Additionally, passages like Romans 5:1-2 and 2 Corinthians 5:21 highlight the complete justification and righteousness believers have in Christ. The doctrines of grace underpin this truth, which rejects any notion that human effort or merit can contribute to one's standing before God. By faith, we rest in the sufficiency of Christ for our salvation, which is a core element of sovereign grace theology.