Rainbows End Literature and Writing Quotes

How we cite our quotes: (Chapter.Paragraph)

Quote #10

"Can we expect something new under the sun? For the first time in human history, a new Secret of the Ages?"

Ah. "You're right, there is room for something more. But you know—some secrets are beyond the expression of those who experience them." (35.15-6)

After all that trouble (nearly getting arrested by Homeland Security and all), Zulfi Sharif still wants to know if there's going to be some more poetry. Which shows how dedicated he is to poetry. But what does it say about Robert that he claims here that some experiences can't be captured in expression? Is he just saying that he can't do it? Or is he actually saying that literature can't "communicate" everything?