Lithium

Lithium's harmony is deceptively sophisticated: a single eight-chord loop that never changes, yet feels entirely different between verse and chorus. The mixture of diatonic chords (D, F#m, Bm, G, A) with borrowed chords from the parallel minor (Bb, C) creates an emotional ambiguity that mirrors the song's bipolar thematic content. The ending on ♭VII rather than resolving to V-I leaves each cycle perpetually unresolved, driving the song's restless emotional energy.

Kurt Cobain wrote "Lithium" as an exploration of extreme emotional states, drawing on themes of faith, doubt, and the oscillation between mania and depression. The song was part of the material Cobain had been developing since the late 1980s, refining it through extensive rehearsals with the band before it was selected for Nevermind.

Released as the third single from Nevermind in 1991, "Lithium" captures the manic-depressive emotional swings that defined Kurt Cobain's songwriting. Its quiet-loud dynamics, modal mixture of major and minor tonalities, and visceral vocal delivery made it a cornerstone of the grunge movement and one of the most emotionally complex rock songs of the 1990s.