Present your bodies not someone else’s body. And the whole entire body, not just the grumbling part or the angry part, but all of it to be offered as a sacrifice.
I’m reminded of two examples from the Old Testament. One is from Leviticus 1 where the offering is brought to the Lord and consumed on the altar as a well-pleasing sacrifice: a soothing aroma to the Lord. The entire thing is consumed in the fire and is pleasing to the Lord but that’s easy for a dead animal: after all, the thing is alive till it gets to the tabernacle then someone slits its throat and has its corpse on the altar. Living Sacrifices have a problem with staying on hot altars, or so the saying goes.
But then we have the second example of Numbers chapter 8 where the Levites are chosen by God to do special work. They remember their past: they’ve been rescued from the bondage of Egypt and delivered from the power of Pharaoh. They have crossed the great divide of the Sea and passed from one side through the other and they were being led to an inheritance and here they stood: a people freed by God and now His. They were cleansed, they were reminded of their salvation and they were told to serve Him in the tent of meeting.