Dennis E. Johnson summarizes three central emphases of Tim Keller‘s homiletic approach to illustrate how “the gospel changes everything” in “an approach to evangelistic, edificatory redemptive-historical preaching” (Him We Proclaim: Preaching Christ from All the Scriptures [Phillipsburg, NJ: P&R Publishing, 2007], 54–61):
1) What both the unbeliever and the believer need to hear in preaching is the gospel, with its implications for a life lived in confident gratitude in response to amazing grace. Christians are constantly tempted to relapse into legalistic attitudes in their pursuit of sanctification, so we never outgrow our need to hear the good news of God’s free and sovereign grace in Christ. . . .