In the New Testament, the Christian concept of God the Father may be seen as a continuation of the Jewish concept, but with specific additions and changes, which over time made the Christian concept become even more distinct by the start of the Middle Ages. The conformity to the Old Testament concepts is shown in Matthew 4:10 and Luke 4:8 where in response to temptation Jesus quotes Deuteronomy 6:13 and states: "It is written, you shall worship the Lord your God, and him only shall you serve. " 1 Corinthians 8:6 shows the distinct Christian teaching about the agency of Christ by first stating: "there is one God, the Father, of whom are all things, and we unto him" and immediately continuing with "and one Lord, Jesus Christ, through whom are all things, and we through him. " This passage clearly acknowledges the Jewish teachings on the uniqueness of God, yet also states the role of Jesus as an agent in creation. Over time, the Christian doctrine began to fully diverge from Judaism through the teachings of the Church Fathers in the second century and by the fourth century belief in the Trinity was formalized.
According to Mary Rose D'Angelo and James Barr, the Aramaic term Abba was in the early times of the New Testament neither markedly a term of endearment, nor a formal word; but the word normally used by sons and daughters, throughout their lives, in the family context.