I'll be quoting extensively from THE DIGNITY AND DUTIES OF THE PRIEST by St. Alphonsus Liguori, a Doctor of the Church: https://www.saintsbooks.net/books/St.%20Alphonsus%20Maria%20de%20Liguori%20-%20Complete%20Works%20-%2012%20-%20Dignity%20and%20Duties%20of%20the%20Priest.pdf