Jake Burhans argues that suffering comes from clinging to negative emotions like worry and anxiety instead of experiencing and releasing them. When you finally let go of stress, you feel immediate physical relief. The more you practice releasing emotions, the more peace you find.
Chapters
This is how you know that your emotions are causing your suffering. Have you ever been worrying about something all day long? You're stressing about it, anxiety, worry, fear, and you get to the end of the day and you go, eff it, I don't even care anymore. I do not have the energy to deal with this. What do you do? You go, ah, and you literally feel a physical sign of relief. Why? Because you finally let go of the emotion. You let go of whatever you were worrying about. It's because holding on to our emotions instead of experiencing them and then letting them go is what causes our suffering. The better you can let go of certain emotions in your life, the more peace that you will find.