Roman Catechism 33.29

Chapter 33 — Part IV: Prayer — On Prayer in General

Section 29. Degrees Of Petition And Thanksgiving — Of these duties of petition and thanksgiving each contains many subordinate degrees. In order, therefore, that the faithful may not only pray, but also pray in the best manner, the pastor should propose to them the most perfect mode of praying, and should exhort them to use it to the best of their ability.