In the quote from Vladimir Nabokov's "The Tragedy of Mister Morn," the speaker expresses a longing for a profound re-examination of life experiences. This whimsical imagery suggests a desire to digest and reprocess memories, savoring both their joyful and melancholy aspects. The act of belching up life and re-chewing it implies a wish to relive moments and extract deeper meanings from them.

The imagery of tasting the sweetness of grass and the bitterness of lilac leaves captures the complexity of life's experiences. It evokes the idea that life is a blend of joy and sorrow, and by revisiting it, one can appreciate the full spectrum of emotions that shape our existence. Nabokov's eloquent metaphor highlights the potential for introspection and the yearning to fully appreciate one's past.