Calling

Every high priest selected to represent men and women before God and offer sacrifices for their sins should be able to deal gently with their failings, since he knows what it's like from his own experience.

But that also means that he has to offer sacrifice for his own sins as well as the people's.

And no one takes this honor for himself, but only when called by God . . . .

-- Hebrews 5:1-4 (The Message & ESV)