The Divine Office: A Study of the Roman Breviary
Chapter 12
RULES FROM MORAL AND ASCETIC THEOLOGY FOR THE RECITATION OF THE BREVIARY.
MORAL THEOLOGY GIVES THE RULES AND LAWS, WHICH MUST BE FOLLOWED FOR THE VALID AND LICIT RECITATION OF THE HOURS. ASCETIC THEOLOGY EXPLAINS THE MEANS, WHICH ARE TO BE USED IN THEIR FERVENT RECITATION.