Bonus: In ancient Greece, some philosophers used to do daily "spiritual exercises" to live wiser lives. Try out this one: imagining your peaceful place. Close your eyes and breathe softly. In your head, begin to imagine a place where you can completely relax. Is that place indoors? Is it outdoors? Is it big or small? Visualize the details of this peaceful place: Are you alone or are there other people with you? Are there animals? Plants? What sounds do you hear? What sensations do you feel? Take a moment to enjoy the peace and quiet. Then gradually open your eyes. How does it feel? As you continue to slowly breathe in and out, here are some last questions to wonder about: Is it possible to be peaceful under any circumstances? Can being peaceful sometimes be a bad thing? Is peacefulness synonymous with happiness? Why or why not?

Bonus plus: Another spiritual exercise that you can try to practice when you feel worried is decomposition, a process described by the Roman emperor and Stoic philosopher Marcus Aurelius. When something worries you, break it down into its most basic parts: an exam is just a series of shapes drawn in ink on a flattened and whitened piece of tree; an insult is just a vibration in the air that momentarily shakes a piece of skin in your ear. Is worry just a matter of perception? Why or why not?