Second, we need to reconcile with the one we are angry with at once. Inner heart problems call for urgent action. Jesus gives the first example of urgent action in vv. 23-24.
23 So if you are offering your gift at the altar and there remember that your brother has something against you,
24 leave your gift there before the altar and go. First be reconciled to your brother, and then come and offer your gift.
The conjunction, “so” (Gk. oun), is important. It means, “therefore, consequently, accordingly.” (Gingrich) If you are angry at someone, God shall judge you. Therefore, Jesus says, “If you are offering your gift at the altar.” The picture here is the offering of a sacrifice at the temple. Jesus says, “If you are offering your sacrifice at the altar in the temple, and there remember that your brother has something against you.”
What must you do? Jesus says in v. 24. “First be reconciled to your brother, and then come and offer your gift” (Matt. 5:24). The verb, “reconciled” (Gk. diallasso), means, “change from enmity to friendship . . . make peace with someone;” (Friberg) I like that—“to change from enmity to friendship.” To reconcile is to change from hate to peace.