If every priest in the Church knew this book and practiced what it says, we would have a different Church. Says the priesthood admits no mediocrity: A priest will either be a true priest and do immense good, or he will be an instrument of great evil. Gives firm, practical instruction to priests for both their personal lives and their ministry on topics including delicacy of conscience, hearing confessions, providing a good example, etc. Written by one of the greatest priests who ever lived.