Accused of displaying literary hubris with this fictional verse, F. Scott Fitzgerald has created his own epigraph that he has moved from his quasi-autobiographical novel This Side of Paradise. Also a pen name for Fitzgerald himself, authorities contend that D'Invilliers represents the poet John Peale Bishop, who was a friend of Fitzgerald's when he was a student at Princeton. (Bishop was a member of the class of 1917.)
The reference here, of course, is to Jay Gatsby and Daisy. In his quest for wealth, Gatsby has always sought to win back Daisy; whom, he declares, is his "grail." But, this grail is a gilded one with a voice "that sounded like money," Nick Carraway says. Feeling that the only way to win Daisy's love is by means of material possessions, Gatsby buys a luxurious home, holds fantastic parties, drives a resplendent car, wears elegant clothes, and has a deliciously decadent lifestyle in the hopes of reaching the green light. Thus, the epigraph alludes to Daisy's materialistic nature. If Gatsby would win her, he must "wear the gold hat" and "bounce high...for her."