Kevin’s eyes were closed, but rather than the usual darkness at the back of his eyelids, he was peering through a frame and into outer space. The cosmos stretched before him. He began to think about Einstein’s theory of relativity. The equation E = mc2 appeared and he intuitively understood what it meant, more so than ever before. The year was 2011, and Kevin was laying on a bed at an ibogaine clinic in Baja California. Kevin, who is using only his first name to protect his privacy, was participating in an observational trial on how the psychedelic drug could help people with addiction.