Aaron was given the responsibility to help Moses, the Servant of God; and Barnabas was used by God to introduce and help Paul, the man of God. Aaron was the brother of Moses and Miriam; and they were Levites. Both Aaron and Barnabas were themselves men of God. Aaron was a prophet and the priest (high priest). Barnabas was an apostle and a teacher. But two of them had strong ministries in helping the two notable men of God - Moses and Paul. And they contributed a lot to the success of the men of God. Aaron's contribution to the ministry of Moses is notable; and Barnabas's contribution to the life and ministry of Paul is also very significant.