Though he humble himself, and go crouching, yet take good heed and beware of him, and thou shalt be unto him as if thou hadst wiped a lookingglass, and thou shalt know that his rust hath not been altogether wiped away.
Even if he humbles himself and comes crouching low, be on your guard and watch him — treat him like a mirror you've wiped clean, knowing that some of the rust hasn't fully come off.