Richard Baxter (1838). “The Practical Works of Richard Baxter: With a Preface, Giving Some Account of the Author, and of this Edition of His Practical Works : an Essay on His Genius, Works and Times : and a Portrait”, p.13
Charles Haddon Spurgeon (1988). “Spurgeon at His Best: Over 2200 Striking Quotations from the World's Most Exhaustive and Widely-read Sermon Series”, Baker Publishing Group