J. I. Packer:
The Puritans did not regard evangelistic sermons as a special class of sermons, having their own peculiar style and conventions; the Puritan position was, rather, that, since all Scripture bears witness to Christ, and all sermons should aim to expound and apply what is in the Bible, all proper sermons would of necessity declare Christ and so be to some extent evangelistic.
–‘The Puritan Vision of Preaching the Gospel,’ in A Quest for Godliness: The Puritan Vision of the Christian Life (Crossway, 2010; repr.), 165-66
(HT: Dane Ortlund)