Therefore if you are offering your gift at the altar and there you remember that your brother has something against you,
Sacrifice, as the sacrifice for sin, is for dealing with sin; whereas a gift is for fellowship with God. The altar spoken of in verse 23 was a piece of furniture (Exo. 27:1-8) in the outer court of the temple (1 Kings 8:64), on which all sacrifices and gifts were offered (Lev. 1:9, 12, 17). The King, in decreeing the new law of the kingdom, referred here to the gift and the altar of the old dispensation because, during the transitory period of His ministry on earth, the ritual law of the old dispensation had not yet ceased. In the four Gospels, before His death and resurrection, in things regarding circumstances, the Lord treated His disciples as Jews according to the old law; whereas in things concerning spirit and life, He considered them as believers who constitute the church according to the New Testament economy.