Meaning of "Teethgrinder" by Therapy?

The lyrics of "Teethgrinder" by Therapy? seem to depict a sense of bravado and confidence on the surface, with the speaker feeling unstoppable and willing to take on any challenge. However, the constant reference to grinding teeth, especially in sleep, suggests that beneath this facade of strength lies a deep-seated anxiety or internal struggle. The act of grinding teeth is often associated with stress, tension, or repressed emotions, indicating that the speaker may be battling inner turmoil or pressure that they are not fully acknowledging or addressing. The repeated phrase "losing his mind" adds another layer to this interpretation, hinting that the speaker may feel like they are on the brink of a mental breakdown despite projecting an image of control and determination. Overall, the song appears to explore the theme of internal conflict and the disconnect between outward appearances and internal struggles.