Lyric discussion by Wurby Tictoc 

Cover art for I of the Mourning lyrics by Smashing Pumpkins, The

I think this song is about Billy Corgan's return to music and life in general, maybe after dealing with the death of his mother on the Adore album. The lines, "I've blown the dust off my guitar" and "I read your letters to feel better" put it best. He's probably referring to fan letters and the Pumpkins' return to more traditional-sounding music.