"The Morning of Spiritual Youth Improved, in the Prospect of Old Age and Its Infirmities" is a collection of sermons written in letters by the venerable John Church. The collection idea appeared from the Church's discussion with his friends and his recollections on the Twelfth Chapter of Ecclesiastes.

This work has been brought up to date and revised to drink from the wells of its zealous and hearty resolve for the truth by those who both preached and taught the doctrine which stood behind both the National Covenant in Scotland, and Solemn League and Covenant. These documents create a religious and binding foundation for the framers of the Westminster Confession of Faith, and the Catechisms. What was their purpose? To uphold the “reformation and defense of religion.” They desired this, 1) to preserve “the reformed religion in the Church of Scotland, in doctrine, worship, discipline, and government, against our common enemies,” and 2) to bring about the “reformation of religion in the kingdoms of England and Ireland, in doctrine, worship, discipline, and government, according to the Word of GOD, and the example of the best reformed Churches.” Such a consensus of unity on the issue of doctrine should be a hearty witness to the 21st century’s church. Authors include Samuel Rutherford, James Kerr, Alexander Henderson, Philip Nye, Thomas Case, Joseph Caryl, Edmund Calamy, Robert Douglas, and many more.