«RECTOR POTENS VERAX DEUS». — Hymn of the sixth hour, composed by St. Ambrose.
The sixth hour corresponds to our midday. The heat of the hour recalls to the author the ardors of concupiscence and sensuality exploited by the noonday demon (Ps. 90:6). Against these, the poet invokes divine action to quench their power.
BIBL.: G. S. Pimont, Les hymnes du Bréviaire romain, I, Paris 1874, pp. 106–10; C. Albin, La poésie du Bréviaire, Lyon 5th ed., pp. 25, 27; V. Terreno, Gli inni dell'Ufficio divino, Mondovì 1932, pp. 42–43.