. DHEA is classified as a neurosteroid; in the same way that steroids help your body grow stronger from physical exercise, DHEA helps your brain grow stronger from psychological challenges. For several hours after you have a strong stress response, the brain is rewiring itself to remember and learn from the experience. Stress leaves an imprint on your brain that prepares you to handle similar stress the next time you encounter it.

Psychologists call the process of learning and growing from a difficult experience stress inoculation. Going through the experience gives your brain and body a kind of stress vaccine. This is why putting people through practice stress is a key training technique for NASA astronauts, Navy SEALS, emergency responders and elite athletes, and others who have to thrive under high levels of stress.

. (This is part of what makes the science of stress so fascinating, and also so puzzling.

Higher levels of cortisol have been associated with worse outcomes, such as impaired immune function and depression. In contrast, higher levels of DHEA—the neurosteroid—have been linked to reduced risk of anxiety, depression, heart disease, neurodegeneration and other diseases we typically think of as stress-related.

An important question, then, is: How do you influence your own — or somebody else’s — growth index?

This mindset can actually shift your stress physiology toward a state that makes such a positive outcome more likely, for example by increasing your growth index and reducing harmful side effects of stress such as inflammation.

Other studies confirm that viewing a stressful situation as an opportunity to improve your skills, knowledge or strengths makes it more likely that you will experience stress inoculation or stress-related growth. Once you appreciate that going through stress makes you better at it, it gets easier to face each new challenge. And the expectation of growth sends a signal to your brain and body: get ready to learn something, because you can handle this.

This is because a god-shaped hole seems to exist in our species’ neuropsychology, thanks to a quirk of our evolutio

For some reason, religion seems to give meaning to suffering – much more so than any secular ideal or belief that we know of.”

System 1, on the other hand, is intuitive, instinctual and automati

. Our minds crave purpose and explanation. “With education, exposure to science and critical thinking, people might stop trusting their intuitions,” Norenzayan says. “But the intuitions are there.”

experts guess that religion will probably never go awa

Placebos seem to work in large part "because they are given by authority figures,