Can gestures alter thought? Thinking about time is deeply interlinked with actions in space, and gestures are abstracted actions. Four experiments showed that gestures alter thinking about time. Participants heard the same speech accompanied by different gestures. The viewed gestures biased listeners toward circular or linear thinking, toward parallel or sequential thinking, toward moving-ego or moving-time perspectives. Gestures can abstract and show mental models more directly and succinctly than speech.