“But we are all like an unclean thing, and all of our righteousnesses are like filthy rags.” Isaiah 64:6
Now read it again.
Do the words have meaning, or are they just words?
Context is king
Reading out of context is a pretext.
In the context, Isaiah 64:6 does not mean that all righteousness performed by God’s people is unacceptable to God. Isaiah is referring to people whose righteousness is in fact hypocritical. It is no longer righteousness. In the very next verse Isaiah says that God approvingly meets “him who joyfully works righteousness” (Isaiah 64:5).