13. is made on the ground of God's choice of Zion (here used for Jerusalem) as His dwelling, inasmuch as the prosperity of the kingdom was connected with that of the Church (Ps 122:8, 9).

     14-18. That choice is expressed in God's words, "I will sit" or "dwell," or sit enthroned. The joy of the people springs from the blessings of His grace, conferred through the medium of the priesthood.