Sometimes today, we find that we would like to serve in some capacity to which the Lord seems to say "No." Maybe due to physical challenges, we aren't able to serve as fully as we would like, and it doesn't seem fair. Honestly, it may not seem very encouraging to know that the Lord has set aside certain people for certain jobs within the body of believers, but what is encouraging is Leviticus 21:21b-23a.
He has a defect; he must not come near to offer the food of his God.
He may eat the most holy food of his God,as well as the holy food;
yet because of his defect, he must not go near the curtain or approach the altar,
Due to this blemish, they were not able to give food to the Lord, but He would still give food to them. Not just any food, but holy food. They were not able to serve the Lord as they no doubt truly desired, but He would still care for them.
It is true that is passage was an instruction manual for the priests, but what a wonderful reminder for those of us who desire to serve Him today. It's a comfort to realize that the Lord truly knows our hearts, and even when we desire to serve and are not able to, He still will give us of His richest blessings if our hearts are serving obediently in the tasks we are given to do.