So if you are offering your gift at the altar and there remember that your brother has something against you, leave your gift there before the altar and go. First be reconciled to your brother, and then come and offer your gift.
Forgiveness is one of the greatest gifts you can not only give to someone who has wronged you, but to yourself as well. Having animosity toward a friend or family member can be a great weight to bear. It can ruin relationships and cause undo stress. Forgive those who you feel have wronged you and lift that weight off of your shoulders.