"In few writers are Christian doctrine, experience and practice more happily balanced than in the author of these Letters, and few write with more simplicity, piety and force."
- C. H. Spurgeon

"It was Newton's goodness rather than his greatness that rendered him so especially attractive " the abundance of the grace of God that was in him. In this respect he was pre-eminent, justifying the eulogy of William Jay who speaks of him as one of the most perfect instances of the spirit and temper of Christianity he ever knew. Some men excel in one virtue more than another. But Newton's character was beautiful in its entireness. It rested on a solid foundation " the initial Christian grace of humility, and of this grace he was a most striking example. He never for a moment forgot that by the grace of God he was what he was."
- Josiah Bull, author of But Now I See: The Life of John Newton.