The First Cut is the Deepest by Cat Stevens delves into the painful aftermath of a first heartbreak. The song reflects on the emotional wounds left by a first significant romantic relationship, emphasizing how profound and lasting this type of heartache can be. Key themes include love, loss, and the difficulty of moving on. One particularly poignant moment in the song is the chorus, where the lyrics 'The first cut is the deepest' underscore the idea that the initial heartbreak leaves the most enduring impact.