Discipleship and witness are not self-sustainable. Preaching equips God's people for the work of serving and building up the body of Christ (Eph. 4:11). The gospel is news that passes from the lips of one who has heard to the ears of one who has not yet heard, then (God willing) it burrows in the soul, energizing the hands in daring response to a word received. Preaching is instigated by an astounding claim: Good news; God has spoken...