Released as part of Bring Me the Horizon's fifth studio album, "That's the Spirit," in 2015, "Diamonds Aren't Forever" showcases the band's evolution from a deathcore outfit to a more polished rock sound. The song exemplifies the band's ability to blend heavy guitar riffs with atmospheric elements, marking a significant shift in their musical direction. This track, alongside others on the album, was well-received, as it demonstrated their willingness to experiment and push the boundaries of their genre, incorporating electronic elements and pop sensibilities while still maintaining their signature intensity.
Lyrically, "Diamonds Aren't Forever" delves into themes of impermanence and the fleeting nature of life and relationships. The phrase itself serves as a metaphor for the fragility of human connections, suggesting that even the most seemingly resilient bonds can crumble under pressure. Lines such as "I know that you find it hard to breathe / When you're drowning in your sleep" encapsulate feelings of despair and the struggle against overwhelming emotions. The song articulates a poignant message about the inevitability of change and the emotional tumult that accompanies it, resonating deeply with listeners who have experienced similar struggles.
The critical reception of "Diamonds Aren't Forever" was largely positive, with many reviewers praising its production quality and lyrical depth. The song contributed to the cultural legacy of Bring Me the Horizon as they carved out a space for themselves in the rock and metal scenes, appealing to a broader audience without sacrificing their integrity. The track has since become a fan favorite, often celebrated for its introspective nature and relatable themes. As part of "That's the Spirit," it helped solidify the band's status as innovators within the modern rock landscape, influencing a new generation of musicians and fans alike.