Manuscript notes for a sermon on Ephesians 4:23. Comments on Ephesians Book 4 generally, its description of corrupted behavior, and the encouragement of a spiritual reformation. Considers "what is imply'd in the renovation of the Spirit of the Mind," the "Necessity of it in Order to our final Happiness in God," and the "Obligations we are Under to seek after, & Cultivate such a Disposition." Reforming the "spirit of the mind" requires more than simply avoiding sinful behaviors. "...Persons sometimes seem rather to be prejudiced against Vice, than charmed into the Love of true Virtues." A true reformation of the mind will inspire shame and sorrow about past transgressions. Need to vigilantly guard the reformed heart against wickedness and aspire to higher levels of purity. "The Soul in its Natural State is so disordered as to be absolutely incapable of true and Lasting Happiness." Stresses Christianity's fundamental objective in making man into "new Creatures, and form us for Pure and holy Lives," imparting a duty upon followers to strive after "a New heart and cultivate a new Spirit & Temper of Mind." References Jeremiah 6:15, 2 Peter 1:4, John 3:3 [actually quotes from John 3:5 but cites as John 3:3], Revelation 21:27.