The track explores the concept of emotional resilience and the desire for invulnerability in the face of heartbreak.

"Diamond Heart" is a collaboration between Norwegian DJ and Swedish singer-songwriter Sophia Somajo , released on September 28, 2018. The song serves as the third and final chapter in the "World of Walker" trilogy, following the singles "All Falls Down" and "Darkside". Song Meaning and Themes

: While the singer lists things they would do if they were unbreakable (like "walk straight through the bullet"), the song ultimately acknowledges the reality of human emotion and the difficulty of letting go. Collaborator Spotlight: Sophia Somajo

: The lyrics express a wish to be "bulletproof" or "solid like a jewel" to avoid the pain of toxic love or "sweet grief".