The key is reality of non duality. It does not contradict expedients of duality. When you look up at th sky, what do you see? Blue sky. Contra how can something be colorless and blue at the same time? Only because it's really colorless and appears to be blue, right? If the sky was really, really blue, how could the same sky be red sometimes? How could it be black sometimes? Can they exist together? Yes, too.