So he waited, listening for a moment longer to the tuning-fork that had been struck upon a star. Then he kissed her.
Gatsby is acknowledging that as soon as his commits to his relationship with Daisy, takes it to a level where his intentions are undeniable, and perhaps makes Daisy fall in love with him, he can’t go back. He knows that he is secretly manipulating her to achieve his dream of wealth, but he tells himself once his “unutterable visions” come true, he will never use people, playing the role of God, again. However, before Gatsby goes through with this, he pauses to reflect on the situation, and if it really is the answer to his dreams. He may have wished for these dreams on a star, another allusion to his romantic readiness and inclination to turn his life into a fairy tale.
Moreover, the image of a “tuning-fork that had been struck upon a star” calls to mind the frequent descriptions of Daisy’s beautiful, musical voice.
To help improve the meaning of these lyrics, visit “The Great Gatsby (Chapter VI)” by F. Scott Fitzgerald and leave a comment on the lyrics box