Priests may not eat of the holy food while unclean or diseased, nor eat unclean food ever.
The holy food is for the priest and his immediate family, not guests or even children that leave the home.
No sacrifice may be blemished. Newborn animals can't be sacrificed until the 8th day.
How this is about Jesus
Jesus our great high priest was pure in all ways, a clean, acceptable and pleasing mediator between God and man.
Sins this may reveal
Skimping on tithing; offering God the throw-aways of our goods, the cheapest possible.
I am the Lord who sanctifies you, 33 who brought you out of the land of Egypt to be your God: I am the Lord.” Leviticus 22:32-33