Jesus was fully divine, fully human in a unique and mysterious way., Jesus was divine, and only appeared to be human., Jesus was a demi-god, a mediator sent by a compassionate God to show humans the truth , Jesus was a savior who had atoned for human sin and reconciled humans to God , Jesus was the fulfillment of Old Testament prophecy, in the Davidic line of kings, and was the last Adam, whose sinless self-sacrifice freed his followers from original sin. established a network of churches, converting gentiles and diaspora Jews , his letters, which become scripture, show the earliest theological development of the significance of Jesus , taught that faith in Jesus is what reconciles people with God, not their observance of the Jewish law, that even Abraham was justified by his faith, not by his obedience to God's commands like circumcision. , Taught that all are one in Christ, experiencing a new life by God's grace All humans are born with original sin and an inability to rise above it on their own. , Salvation from sin is possible only as a matter of God's gift or grace, not by human merit. , God is understood as one divine substance, with three persons of Father, Son, and Holy Spirit, whose relationship is grounded in love and mutuality. , While the earliest Christians were influenced by apocalypticism, this eschatological expectation began to be interpreted spiritually as well as temporally, such that events like judgment and resurrection can be said to be approaching, or they can be interpreted as already realized in the interior lives of believers.