"He knew that when he kissed this girl, and forever wed his unutterable visions to her perishable breath..."

"... his mind would never romp again like the mind of God."

That's a challenging one, today's sentence in the "Gatsby" project (wherein we examine, each day, one sentence, out of context, from "The Great Gatsby").

I'm seriously intimidated, because I can't bust out of the sentence to get a grasp of how it can be that his mind is, pre-kiss, romping like the mind of God. Oh, but suddenly it's clear! If he kisses her, he enters the concrete word, where one specific thing after another will happen. But before he takes that action, he exists within imagination — his unutterable visions. There's so much to gain and so much to lose. Within imagination, he is like God, fully free. Anything — everything — can happen. You throw that all away if you kiss her. To kiss her is not to marry her, but there is a wedding: of the mind to the body, the perishable breath.

And quite aside from the man and the resisted kiss, there's an assertion about God. God has a romping mind.

ADDED: Chip Ahoy animates the sentence: