Clear one's mind.
As the saying goes, "peace of mind is naturally cool." This indifference is not really indifference, but a normal heart. If you want to have a normal heart, you must have an inclusive heart. You shouldn't care too much about things. It is best to listen to the scriptures in Buddhist temples. Some time ago, I listened to those temples in Luoyang, and I felt good, as if I could feel something.