Charles Ellicott Commentary Psalms 71:23

"My lips shall shout for joy when I sing praises unto thee; And my soul, which thou hast redeemed." — Psalms 71:23 (ASV)

My lips shall ... —Rather, my lips shall sing while I play to thee, i.e., a hymn should accompany the harp.

There is, therefore, no thought of the union of the bodily and spiritual powers in praise of God, though it is natural that the verse should have suggested such an interpretation to the Fathers.

And indeed, the thought of the poet, if we read the whole psalm, with its retrospect of life, is a wish—

“That mind and soul according well,
May make one music as before,
But vaster.”