How can/do we re-wire our brains at times of crisis and challenge?

In this source Upgrade Your Brain! I found some information according to the question I picked. What I found was, any person who goes through a rough experience can always recover. No matter what the circumstances are. The article states step by step, how to recover your self from any tragedy. The mind works according to your feelings, so when you step back and feel your heart and go back to a time where you felt safe, loved and nurtured you can begin to feel all the good feelings you had before any situation occurred.