How do we know the new covenant is better than the old covenant?

The superiority of the new covenant over the old can be found in Hebrews 8:6, where it states that Jesus has obtained a more excellent ministry and serves as the mediator of a better covenant. The old covenant, made with the nation of Israel, required adherence to the law and involved repeated animal sacrifices for sin. In contrast, the new covenant provides a permanent solution through the once-for-all sacrifice of Christ, who fulfilled the law and secured eternal redemption for His people. This shift from a bilateral to a unilateral covenant marks its transformative nature, emphasizing grace over works.