For the essence of sin is man substituting himself for God [Gen. 3:1-7], while the essence of salvation is God substituting himself for man [2 Cor. 5:21]. Man asserts himself against God and puts himself where only God deserves to be; God sacrifices himself for man and puts himself where only man deserves to be.
John StottThe major mark of justified believers is joy, especially joy in God himself. We should be the most positive people in the world. For the new community of Jesus Christ is characterized not by a self-centered triumphalism but by a God-centered worship.
John StottDo we claim to believe in God? He's a missionary God. You tell me you're committed to Christ. He's a missionary Christ. Are you filled with the Holy Spirit? He's a missionary Spirit. Do you belong to the church? It's a missionary society. And do you hope to go to heaven when you die? It's a heaven into which the fruits of world mission have been and will be gathered.
John Stott