In his sermon 'The Promises of God--No. 3', Charles Finney emphasizes the transformative power of the New Covenant through the Holy Spirit, contrasting it with the Old Covenant which relied on human strength and was ultimately ineffective in securing holiness. He explains that the New Covenant offers a profound internal change, where God's laws are written on the hearts of believers, enabling them to live in obedience and righteousness. Finney highlights that the New Covenant is not just a continuation of the Old but a fulfillment that provides a mediator in Christ, ensuring the promises of God are realized in the lives of believers. He stresses the importance of recognizing the distinct roles of both covenants in the believer's journey towards sanctification and spiritual life.

A.W. Pink explores the allegory of the two covenants in Galatians 4:21-31, emphasizing the contrast between the covenant of law represented by Hagar and the covenant of grace represented by Sarah. He explains that the historical events in Abraham's family serve as a divine illustration of the spiritual truths regarding bondage and freedom. Pink warns the Galatians against the dangers of returning to the law, highlighting that true believers are children of promise, born of the Spirit, and not of the flesh. He concludes that the new covenant in Christ supersedes the old, and believers must embrace their identity as free children of God. The sermon serves as a reminder of the spiritual liberty found in Christ compared to the bondage of legalism.

Robert Murray M'Cheyne expounds on the New Covenant as described in Hebrews 8:6, emphasizing its superiority over the Old Covenant. He outlines the various covenants in the Bible, illustrating how the New Covenant, established through Christ, offers better promises and a more excellent ministry than the old. M'Cheyne highlights that while the Old Covenant was a ministration of death, the New Covenant is one of grace and life, inviting all to come boldly to God. He stresses the importance of recognizing Christ as the mediator who reconciles us to God, urging believers to trust in His obedience and sacrifice.

Charles Finney discusses 'The Covenants,' emphasizing the transition from the Old Covenant to the New Covenant as outlined in Hebrews 8:13. He explains the nature of covenants, their mutual obligations, and the significance of God's covenants with humanity, including the Adamic, Abrahamic, and Sinai covenants. Finney clarifies that while the Old Covenant is set aside in terms of salvation, its moral precepts remain binding, and the New Covenant fulfills the promises of the previous covenants by writing God's law in the hearts of believers. He urges the congregation to embrace the New Covenant and its implications for their spiritual lives.