A. 1 O praise the LORD, all ye nations:
praise him, all ye people.

B. 2 For his merciful kindness is great toward us:

B’. and the truth of the LORD endureth for ever.

A’. Praise ye the LORD (Yah).

Note:  verse 1 of this shortest of Psalms is quoted by the Apostle in Romans 15. Interestingly the context makes reference to  the mercy and truth of the Lord – although in reverse order.

“8 Now I say that Jesus Christ was a minister of the circumcision for the truth of God, to confirm the promises made unto the fathers: 9 And that the Gentiles might glorify God for his mercy; as it is written, For this cause I will confess to thee among the Gentiles, and sing unto thy name. 10 And again he saith, Rejoice, ye Gentiles, with his people. 11 And again, Praise the Lord, all ye Gentiles; and laud him, all ye people. 12 And again, Esaias saith, There shall be a root of Jesse, and he that shall rise to reign over the Gentiles; in him shall the Gentiles trust.