The Torah reading אמר Emor (“say,” Leviticus 21–24) calls YHWH’s servants to model a different way of life and keep anniversaries of important things Heaven has done, is doing and will do to make things right again, particularly the mission of Yeshua haMashiakh (Jesus the Christ).
All of Leviticus is primarily addressed to the priesthood, but Leviticus 21 is about qualifications of the High Priest, not regular priests or the lay Israelites. There are things that other Israelites can do, within limits that are totally forbidden to the High Priest. His family, descendants of Aharon (Aaron) is held to a higher standard than other families. This chapter also shows us how holy — set apart — our High Priest, Yeshua, was to be.
These two chapters of Leviticus and the vision George Washington had at Valley Forge during the U.S. War of Independence have some interesting connections.