Those who are attuned to such cues can use them to make more-informed decisions. A study led by a team of economists and neuroscientists in Britain, for instance, reported that financial traders who were better at detecting their heartbeats — a standard test of what is known as interoception, or the ability to perceive internal signals — made more profitable investments and lasted longer in that notoriously volatile profession.

Agency starts with what scientists call interoception, our awareness of our subtle sensory, body-based feelings: the greater that awareness, the greater our potential to control our lives. Knowing what we feel is the first step to knowing why we feel that way. If we are aware of the constant changes in our inner and outer environment, we can mobilize to manage them.

People who maintain some kind of regular meditative practice actually have measurably thicker brains in certain key regions. One of those regions is the insula, which is involved in what’s called “interoception”—tuning into the state of your body, as well as your deep feelings. This should be no surprise: A lot of what they’re doing is practicing mindfulness of breathing, staying really present with what’s going on inside themselves; no wonder they’re using, and therefore building, the insula.