In the book "High Fidelity" by Nick Hornby, the protagonist grapples with complex emotions after a breakup. This particular quote reveals a moment of pent-up frustration and confusion, highlighting how the character desires to inflict pain on his ex-partner. It indicates that this impulse is tied to a significant emotional struggle, stemming from a sense of impotence experienced since their separation.

The quote encapsulates the dual nature of relationships—how love and hurt can intertwine. The mention of "this day of all days" suggests that specific dates can amplify emotions, triggering memories and feelings that make the character feel enabled to confront his past. This moment illustrates the difficulty of moving on and the lingering impact a relationship can have on a person's psyche.