Justin Taylor posted a nice primer on a Biblical theology of the image of God in man.  Man was created in the image of God (Gen 1:26; 9:6; James 3:9).  Though that image became marred by sin, it was passed on to Adam’s posterity (Gen 5:3; 1 Cor 15:49).  In contrast to man who was made in the image of God, Jesus is the image of God (Col 1:15; 2 Cor 4:4).  The Christian hope is to be fully transformed into Christ’s image.  We have begun to experience that transformation already (Rom 8:29; 2 Cor 3:18; Col 3:10), and will see the fulfillment of the process at the return of Christ (1 Cor 15:49; 1 John 3:2).