The essence of apostasy is changing sides from that of the crucified to that of the crucifier.
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 StottAn unchurched christian is a grotesque anomaly. The New Testament knows nothing of such a person. For the church lies at the very center of the eternal purpose of God. It is not a divine afterthought. It is not an accident of history. On the contrary, the church is God's new community.
John Stott