I am so delighted by someone's promise of tomorrow, as though in reality I have truly come to believe it.

This couplet captures the tender sweetness of clinging to hope, even when you know it might be an illusion. Deep down, the poet recognizes that the beloved's 'promise of tomorrow' is likely empty, yet the joy it sparks is so overwhelming that he acts as though he truly believes it. It beautifully shows how love often chooses the warmth of a fleeting promise over the cold certainty of heartbreak.