Shinji didn't really notice the question she asked about the phrase "lighten up", but instead he asked her to come to the edge of the roof with him. He wanted to see her reaction to other things. "I take it that you have lived on Earth for awhile now, right? Well, look at all of those people down there, all the light, and the happy faces. Shouldn't you embrace this place as your new home rather than seeing it as a way to survive?" He paused looking at all the people down at markets and all of the buildings below. The lights weren't as bright to him, though, because his eyes were specially developed to dim his eye sight so that he wasn't blinded by the over use of his power. But he knew that it was still a great sight to see. His pause wasn't the end of what he was saying but after saying this and then looking at the ground below, he stopped to hear reply. His expression was no longer of interest as it was more of sentiment.