Sacerdotalis Caelibatus §28

²⁸ Like Christ Himself, His minister is wholly and solely intent on the things of God and the Church, (48) and he imitates the great High priest who lives ever in the presence of God in order to intercede in our favor. (49) So he receives joy and encouragement unceasingly from the attentive and devout recitation of the Divine Office, by which he dedicates his voice to the Church who prays together with her Spouse, (50) and he recognizes the necessity of continuing his diligence at prayer, which is the profoundly priestly occupation. (51)