Brethren, we could well manage to be half as intellectual (of the modern pseudo kind) if we were twice as spiritual. Preaching is a spiritual business. A sermon born in the head reaches the head; a sermon born in the heart reaches the heart. Under God, a spiritual preacher will produce spiritually minded people. Unction is not a gentle dove beating her wings against the bars outside of the preacher’s soul; rather, she must be pursued and won. Unction cannot be learned, only earned—by prayer. Unction is God’s knighthood for the soldier-preacher who has wrestled in prayer and gained the victory. Victory is not won in the pulpit by firing intellectual bullets or wisecracks, but in the prayer closet; it is won or lost before the preacher’s foot enters the pulpit. Unction is like dynamite. Unction comes not by the medium of the bishop’s hands, neither does it mildew when the preacher is cast into prison. Unction will pierce and peculate; it will sweeten and soften. When the hammer of logic and the fire of human zeal fail to open the stony heart, unction will succeed.
What a fever of a church building there is just now! Yet without unctionized preachers, these altars will never see anxious penitents.
Leonard Ravenhill, Why Revival Tarries, pg.20-21