The three strands of deep science—injunction, apprehension, confirmation—give us a reliable methodology for learning about both the world without and the world within. Want to know what the moons of Jupiter look like? Look through a telescope. Want to know what satori is? Sit down and count your breaths. While you're at it, have a couple friends do the same thing, and then compare notes. After all, if your experience of satori involves becoming one with a jelly donut, you, um, might want to see if that happened to anyone else....