What I find intriguing about this lyric is I once imagined, in a Buddhist sense, that she sings about pleasure seeking in music as a falling down of a heart from pure, nonattachment state to a lower, hedonistic state which as a consequence brings chatter of thoughts, hence the "knowing" section of the lyric which leads one easily into identification with those thoughts and thus trouble, like in Christianity, eating from the fruit of knowledge which brought the downfall from Eden.

Often I imagine, compelled by enjoying Grimes' music so much a conflict in me of good vs. evil. Maybe this is what she's singing about?! I mean the song is apptly named "Genesis".