How do we know the New Covenant is valid?

The New Covenant is ratified by the blood of Jesus, a profound truth rooted in scripture. Hebrews 9:18-22 elaborates that covenants in biblical times were established through blood. Jesus, in Matthew 26:28, explicitly refers to His blood as the blood of the New Covenant, signifying that His sacrificial death fulfills and transcends the earlier Old Covenant established with Israel. This new covenant ensures that the law is written on believers' hearts instead of on stone tablets, allowing for a more personal and transformative relationship with God, as seen in Hebrews 8:10-12.