Elderberry Wine by Elton John is a nostalgic song that reminisces about better times in a past relationship, evoking strong emotions of longing and reflection. The key theme of the song is the juxtaposition of past happiness with present discontent, using elderberry wine as a metaphor for the sweetness of former memories. A poignant moment in the song is when the singer laments how everything seemed better in the past 'when we could still have fun back then.' This lyrical expression underscores the deep yearning for a time when things were simpler and more enjoyable.