To be ashamed of him and his words is to turn from I AM as the truth and trust the senses instead, and that turning is the whole meaning of an adulterous generation. Adultery here is not of the body. It is faithlessness to your own awareness of being, going after the evidence of the outer world as though that were the husband, when the only creative power is the imagining self within.
The Son of man who comes in glory is that same power risen and awake in a person, no longer buried and ignored. A man who denies imagination in the hour it feels absurd, who is embarrassed to hold a state the facts mock, finds nothing risen in him to meet, for what he refused to honor cannot honor him back. The state a person stands by is the state that stands by him. He reaps exactly the loyalty he gives.