If every priest in the Church knew this book and practiced what it says, we would have a different Church. Says the priesthood admits of no mediocrity; that a priest will either be a true priest and do immense good, or he will be an instrument of great evil. Gives firm, practical instructions to priests for both their personal life and their ministry-delicacy of conscience, hearing confessions, good example, etc. By one of the greatest priests who ever lived.