How do we know the New Covenant is effective for salvation?

The New Covenant is ratified by the blood of Christ and assures believers that their sins are forgiven and that they will know God. As stated in 2 Corinthians 1:20, 'For all the promises of God in him are yea, and in him Amen.' This covenant does not depend on our works but solely on Christ's righteousness. Thus, it guarantees that all who come to Him in faith are accepted and loved by God, despite their unrighteousness. Furthermore, Hebrews 8 highlights the promises of the New Covenant, emphasizing God's commitment to put His laws in our hearts and to be merciful to our unrighteousness.