You know the old saying about Zen meditation, Tibetan meditation, and Vipassana meditation? Well, no, you probably don’t. It’s a saying that’s meant to capture the difference between these three Buddhist contemplative traditions—Vipassana, with its emphasis on mindfulness; Tibetan, which often steers the mind toward visual imagery; and Zen, which sometimes involves pondering those cryptic lines known as koans. Here’s the saying: Zen is for poets, Tibetan is for artists, and Vipassana is for psychologists.