When God told Israel what part of the animals He wanted for Himself, He said He wanted the fat.
the priest shall burn [the fat covering the entrails and all the fat that is on the entrails and the two kidneys with the fat that is on them] on the altar as a food offering with a pleasing aroma. All fat is the LORD’S. (Leviticus 3:16, see also the whole chapter, but especially the context in verses 14-15)
The sacrifices were not chosen because they were the most skinny, because they were made of more skin. The animals were bred and fed to be big and fat, and that pleased the Lord.
His people are also called sheep (Psalm 100:3), we are called sacrifices (Romans 12:1). God desires that we be without blemish, He also desires that we be fat. I am talking about spiritual weight, about holiness that’s heavy when you try to push it around and joy that sizzles when the fire is put to it.
He is fattening us up for slaughter. He loves us so much that even when we are sheep led to the slaughter (Psalm 44:22, quoted in Romans 8:36), we can’t be separated from His love, which is Paul’s point in Romans 8. The Lord may not require our martyrdom, but He most certainly requires us to be living sacrifices.
May the bread and wine at this Table fatten up your faith, for sake of pulling the plow, for sake of a being a pleasing aroma to Him when things heat up. This is part of our witness, part of being “the aroma of Christ to God” (2 Corinthians 2:15-16).