Fear is a normal and healthy response to things that may harm us. But fear can also hold us back from doing the things we want to do. This week, we talk to psychiatrist and neuroscientist Arash Javanbakht about the psychology of fear — how it helps us, how it hurts us, and what we can do to harness it.For more on the science of fear and anxiety, including how you can overcome it, check out our episode A Better Way to Worry.