Psalm 51:10
"It is used "here" evidently in the sense of causing that to exist which did not exist before (Yes, something that DID NOT exist before - ignoring the source of where it came from, as JW and I DO NOT claim Christ was created from nothing); and there is clearly a recognition of the divine "power," or a feeling on the part of David that this could be done by God alone. The idea is, however, not that a new "substance" might be brought into being to which the name "a clean heart" might be given [nullifying Gen 1:1 usage], but that he might "have" a clean heart; that his heart might be made pure; that his affections and feelings might be made right; that he might have what he was conscious that he did "not" now possess - a clean or a pure heart. This, he felt, could be produced only by the power of God; and the passage, therefore, proves that it is a doctrine of the Old Testament, as it is of the New, that the human heart is changed only by a divine agency." - Barnes Notes
not that you listen to Barnes regarding anything I have cited to you before,, but ill through this in.
[italics and bracketed comments added by me, see hyperlink "Barnes Notes" for original statement]