Here's a Baptist version for you.
"And all our righteousnesses are as filthy rags; which is to be understood not of the righteousness of some persons in the church, which lay in outward rites, ceremonies, and sacrifices, which were no righteousness before God, and could not take away sin; and were indeed on many accounts, as they were performed, loathsome and abominable; see Isaiah 1:11, or of others that lay in outward legal duties and works of the law, which were not done from right principles, as well as not perfect; and so, because of the impurity, imperfection, pride, and vanity, that appeared in them, were abominable to the Lord: but of the righteousnesses ***of the church herself;*** not of the righteousness of Christ, which was made hers by imputation" (john Gill Baptist)

As Matthew Henry says.
"We have all by sin become not only obnoxious to God's justice, but odious to his holiness; for sin is that abominable thing which the Lord hates, and cannot endure to look upon. Even all our righteousnesses are as filthy rags. (1.) "The best of our persons are so; we are all so corrupt and polluted that even those among us who pass for righteous men, in comparison with what our fathers were who rejoiced and wrought righteousness (v. 5), are but as filthy rags, fit to be case to the dunghill."

Thats "mumbo jumbo"