40 We sincerely hope, Venerable Brethren, that these lessons from the life of St. John M. Viand may make all of the sacred ministers committed to your care feel sure that they must exert every effort to be outstanding in their devotion to prayer; this can really be done, even if they are very busy with apostolic labors.
Source: Sacerdotii Nostri Primordia (Vatican.va)