“Especially when I'm wearing the helmet!”

Source: The Long Dark Tea-Time of the Soul (1988), Ch. 22
Context: "Immortals are what you wanted," said Thor in a low, quiet voice. "Immortals are what you got. It is a little hard on us. You wanted us to be for ever, so we are for ever. Then you forget about us. But we are still for ever. Now at last, many are dead, many are dying," he then added in a quiet voice, "but it takes a special effort."
"I can't even begin to understand what you're talking about," said Kate, "you say that I, we —"
"You can begin to understand," said Thor, angrily, "which is why I have come to you. Do you know that most people hardly see me? Hardly notice me at all? It is not that we are hidden. We are here. We move among you. My people. Your gods. You gave birth to us. You made us what you would not dare to be yourselves. Yet you will not acknowledge us. If I walk along one of your streets in this... world you have made for yourselves without us, then barely an eye will once flicker in my direction."
"Is this when you're wearing the helmet?"
"Especially when I'm wearing the helmet!"