No works of the flesh as by law can be boasted of, because simply not transgressing the law is nothing to boast of. Works of faith that crucify the flesh justify us as Abraham.
But wilt thou know, O vain man, that faith without works is dead? Was not Abraham our father justified by works, when he had offered Isaac his son upon the altar? Seest thou how faith wrought with his works, and by works was faith made perfect?
No amount of pretty words, twisting of Scripture, or Greek expose can change the simple truth of Scripture, that no man is justified, until after the perfecting work to faith is accomplished.
Abraham was not justified with God, until after he had offered up Isaac, and no child of Abraham in the faith is ever justified by Christ, until after we do the same and are walking with Jesus, even as Abraham walked with the God of Israel and was called His Friend.
Ye are my friends, if ye do whatsoever I command you.
No doing the work, no friendship, no justification.
Faith aloners separate their own salvation from fellowship and friendship with Jesus, in order to do away with any hint of perfecting the faith by working to crucify the flesh on our own cross.
Salvation only begins with forgiveness of past sinning, and justification only begins with crucifying the sinning.
That crucifying of our old selves begins immediately within the heart, upon being forgiven of past sins, to purify our heart of lust and our mind of every tempting thought, that comes against knowing Jesus and walking as our justified father Abraham walked in the fear of the Lord:
And he said, Lay not thine hand upon the lad, neither do thou any thing unto him: for now I know that thou fearest God, seeing thou hast not withheld thy son, thine only son from me.
Faith aloners that reject the perfecting works to faith, have no fear of God in their own eyes, because they imagine for themselves salvation and justification based on their own lies. They only believe themselves saved and justified without works, and that's not enough for God:
Thou believest that there is one God; thou doest well: the devils also believe, and tremble.