If you were looking for a memorizable phrase for prayer or study, in the Reina-Valera tradition affirms truth and finality, just as Jesus used double “amen” to stress divine authority.
So, the “useful piece” could be that (Psalm 41:13, 72:19, 89:52) is a doxology of praise and certainty in the Reina-Valera — a strong ending to sections of Psalms.