A portion of a letter by John Newton to a friend. No date is given. Jerry Bridges quotes this letter in his book, Respectable Sins: Confronting the Sins We Tolerate, p.66.
How happy are they who can resign all to [God], see his hand in every dispensation, and believe that he chooses better for them than they possibly could for themselves.
Letters of John Newton, printed by the Banner of Truth, 1960, p. 137.