However, when we’ve gotten used to “predicting” (read: interpreting) everything as a threat, our anxiety levels are high all the time. There’s no actual threat, but there are so many things that might happen to worry about. Our body’s response to fear is to activate the sympathetic nervous system — whether the threat is real or imagined. This evolved to work as a short-term boost to get us out of danger and isn’t well suited for managing vague, continued threats. Over time, fear and anxiety can have adverse effects on the mind, emotions, and body.