Consider one of the simplest and oldest ecstatic techniques: meditation. Historically, if you wanted to use meditation to consistently produce a state where the self vanished, decades of practice were required. Why? Because your target was nothing more than a peculiar sensation, and hitting it was like throwing darts blindfolded. But researchers now know that the center of that target actually correlates to changes in brain function—like brainwaves in the low-alpha, high-theta range—and this unlocks all kinds of new training options.