What about it is hard to understand?
He was beat half-dead and stripped naked by the devil using scripture from Jerusalem. His spirit exposed, his garments removed, and his spirit wounded by people using against him his own faith, and his Lord's scriptures.
Some oil, that is, knowledge in truth, and some wine, which in this case is justification, and a renewing of the mind which gives life to the spirit.
Jesus is the righteous servent.
'By his knowledge will my righteous servant justify many.'