Some things happen to make you understand the nature of things, and when the nature of things are laid bare in front of  you, on the one hand, what you didn't understand and couldn't let go of will suddenly be relieved at that moment, on the other hand, the naked nature of things will leave traces in your heart, you will wonder if I can be as simple and happy as before after knowing more and more things, only recently did I realize that happiness has nothing to do with time, it is also not attached to anything. It comes from the live well within your inner mind.