How do we know that Christ is sufficient for all our needs?

The sufficiency of Christ is grounded in His role as the mediator who has accomplished our salvation. In Colossians 2:10, it says, 'And ye are complete in him, which is the head of all principality and power.' This indicates that all spiritual needs are fully met in Christ, who is both God and man. His work on the cross provides redemption, forgiveness, and the empowerment needed to live a godly life. Believers can thus rely on Him for every aspect of their spiritual lives, knowing He is all they need.