Psalms 71:23

23.My lips shall rejoice (118) when I sing to thee. In this verse David expresses more distinctly his resolution not to give thanks to God hypocritically, nor in a superficial manner, but to engage with unfeigned earnestness in this religious exercise. By the figures which he introduces, he briefly teaches us, that to praise God would be the source of his greatest pleasure; and thus he indirectly censures the profane mirth of those who, forgetting God, confine their congratulations to themselves in their prosperity. The scope of the last verse is to the same effect, implying that no joy would be sweet and desirable to him, but such as was connected with the praises of God, and that to celebrate his Redeemer’s praises would afford him the greatest satisfaction and delight.

“My lips shall move briskly, when I sing unto thee,
And my soul shall rejoice, which thou, etc.”

— Horsley.