How do we know salvation is dependent on Christ's work?

The foundation of Christian salvation rests solidly on the complete and finished work of Christ. As noted in the sermon, the Old Testament emphasizes a law-based system where salvation appeared dependent on human actions, but Christ’s coming established a New Testament where salvation is wholly reliant on His redemptive actions. Scriptures such as John 6:39 affirm that all that the Father has given to the Son will be secured, emphasizing Christ’s role as the surety for all who believe. The blood of Jesus is the means through which sin is wholly dealt with, allowing believers to stand without guilt before God.