Our entire lives, he argued, are governed by a voice in our heads. This voice is engaged in a ceaseless stream of thinking—most of it negative, repetitive, and self-referential. It squawks away at us from the minute we open our eyes in the morning until the minute we fall asleep at night, if it allows us to sleep at all. Talk, talk, talk: the voice is constantly judging and labeling everything in its field of vision. Its targets aren’t just external; it often viciously taunts us, too.
