But I, with a song of thanksgiving, will sacrifice to you. What I have vowed I will make good. Salvation comes from the LORD.”
Sacrifice is one of the best ways to show thanksgiving. Sacrifice first and foremost is a reminder of what we have to be thankful for the most, Jesus’ sacrifice on the cross. All of the Old Testament sacrifices pointed to Jesus’ sacrifice in one way or another.
But another way that sacrifice is thanksgiving is that we acknowledge that God is the source of what we’re giving up. When we are willing to make a sacrifice we acknowledge with thanks that God gave it to us in the first place.
There is a lot of debate over whether a ten percent tithe is a requirement in the New Testament church. This debate misses an obvious point however. Anyone who gives ten percent out of duty and compulsion does not do so with thanksgiving. The person who offers their sacrifice without reservation and does so joyfully is the one who is truly thankful.
Sacrifice is meant to be, well, a sacrifice. It is not extra that is given away. It is giving up something that we could otherwise make use of. But when we do so out of thanksgiving, we acknowledge that God is the source of our sacrifice and He is more than capable of providing all that we need in the future.