“If a minister has light without heat and entertains his [hearers] with learned discourses, without a savour of the power of godliness, or any appearance of fervency of spirit, and zeal for God and the good of souls, he may gratify itching ears, and fill the heads of his people with empty notions; but it will not be very likely to teach their hearts, or save their souls.”
-Jonathan Edwards; cited in John Piper, The Supremacy of God in Preaching (Grand Rapids, MI: Baker, 1990), 48.