New International Version
“Therefore, if you are offering your gift at the altar and there remember that your brother or sister has something against you, leave your gift there in front of the altar. First go and be reconciled to them; then come and offer your gift.
The Hebrew word for altar is mizbeah, which means “to slaughter.” In Greek, the word for altar is thusiasterion, which means “a place of sacrifice.”
Have you ever thought about what a real altar is? An altar is a raised area in a house of worship where people can honor God with offerings. It is prominent in the Bible as "God's table," a sacred place for sacrifices and gifts offered up to God. Do you want God’s food or the world? Before you can offer up a true sacrifice to God we have to be aware that if we have ought against someone that it’s our place to go and make it right so God will hear our prayers and accept our sacrifice. I want the food at Gods table. So I can’t have anything against anyone in order to receive what He has for me.