Ethics for Paul, therefore, is ultimately a theological issue pure and simple- that is, an issue related to the known character of God. Everything has to do with God, and what God is about in Christ and the Spirit. Thus: (1) the purpose (or basis) of Christian ethics is the glory of God (1 Cor 10:31); (2) the pattern for such ethics is the Son of God, Christ himself (1 Cor 4:16-17; 11:1; Eph 4:20), into whose likeness we were predestined to be transformed (Rom 8:29); (3) the principle is love, precisely because love is at the essence of who God is; (4) and the power is the Spirit, the Spirit of God.
Gordon Fee, Paul, the Spirit and the People of God, p106