There may be two ways to experience the mysterious door.
A person often lingers on the edge of desire. Just like the kind of behavior that you don't control yourself every time, just like a newborn child, do whatever you want. Indulge your own desires, do what you like, then slowly feel the sublimated state in your desires, and finally touch the boundary of the Xuan door. This kind of self-cultivation that sounds wishful is the most terrible, and it is difficult to determine whether you will do something that society does not allow.
Secondly, we should abandon our desire and gradually refine it in a narrow cage until it disappears into nothingness, so that we may also come into contact with the mysterious door. All beings should have more abstinence methods in this respect than indulgence. Although some people often go too far, hoping to imprison their desires and become ice sculptors with a heart of stone, this is the most acceptable way for modern people.