Perhaps you get the sense that Luther was having a bad day when he wrote this article. It does seem kind of harsh in the language that is used. Again, what we are seeing here is simply a difference between his culture and ours. So if you can get past the language, there is some good stuff here.
When it comes down to communion there is no need to make things complicated. That is the gist of this article. For in Luther's day there were some practices and ideas that are simply not in line with the Scriptures. Not only are they not in line with the Scriptures, but they contradict them.
Again, there is no need to make things any more complicated than what we find in the Scriptures. Jesus says, "This is my body...This is my blood." These things are given and shed for you. Now how that works and what it all looks like, is beyond our ability to understand. It is, in a word, a mystery. But it is a mystery that is ultimately good for us.
In this mystery we receive forgiveness of sins, life and salvation. It is a way that God has chosen to pour out his grace into our lives. It is not something that we earn or deserve, but it is a gift that is given because that is how good our God is. Plain and simple.
This article focuses more on misuses or misunderstandings/false practices that are happening around communion in Luther's day.
For us we remember that this is ultimately a gift that God gives to us. Through this gift we are blessed and experience our God and his grace in a very real and intimate kind of a way. I pray that God's presence in this way is a blessing to you in your life.
Pastor CJ
