Roman Catechism 36.3

Chapter 36 — Part IV: Prayer — The Second Petition: Thy Kingdom Come

Section 3. Greatness Of This Petition — In the first place pastors will be greatly assisted towards an accurate and careful explanation of this Petition by the thought that (the Redeemer Himself) commanded this Petition, although united to the others, to be also offered separately, in order that we may seek with the greatest earnestness that for which we pray; for He says: Seek first the kingdom of God and his justice, and all these things shall be added unto you.