From a fellow priest:
"One of the most polarizing positions one can take in theological discourse is with regards to the sacrifice of the Mass. Or, put differently, whether one believes that the Eucharist is a sacrifice or merely a memorial of one. This question ultimately centers around the question of what worship is. For more catholic minded folk, worship necessarily entails that there be a sacrifice offered. For the more Evangelically minded spirit, any notion of our worship involving a sacrifice is either superstitious or a sign of the times (depending on your flavor of Evangelicalism); and, If you’re Reformed, it’s both of those.
In this article. I would like to consider whether or not the offering of a sacrifice is essential to worship, and more particularly whether or not the Eucharist is considered a sacrifice. In the midst of this, we will also look briefly upon the Incarnation and see what it informs us about our main topic."