I find your
Phil 3.9 which I assume is from Paul's epistle to Philemon, very strange; from the JKV
Phil 3.9, Yet for love's sake I rather beseech thee
, being such an one as Paul the aged, and now also a prisoner of Of Jesus Christ.
I have to admit that I was not able to a lot of sense out of that epistle, first I noted the words, righteousness and Law, were not mentioned in the epistle, and Christ is used only in reference to being Christs prisoner. In verse 9 and 10 Paul asks earnestly, ( I beseech thee), But it is hard to find the question. In verse 20 Paul asks of Philemon, "refresh my heart in Christ?"
<< We have no righteousness, all righteousness comes from God>> Nonsense, the Law comes from God; even an atheist can keep the commandments, and according to Solomon it is profitable to do so. The atheist has not entered into the covenant, so his righteousness is filthy rags, relatively speaking; God's greatest complaint against Israel was that they would not enter in (into the covenant).
There is a common Christian teaching that says, because Jesus kept the Law we do not have to, and people say that in the same way you say, We have no righteousness, all righteousness comes from God. There is another Christian teaching you may not have heard, "Because the Law is abrogated sin no longer exists.
I do not agree with your interpretation of scripture at all, I do not know whether Jesus (the human, son of man) stumbled or not, if he did he would have repented.