I am a sensitive and fragile person, and I always put layers of thick wax on my heart, until it wraps up my barren green memories of embarrassment and bitterness that erode my body and mind all the time. Many memories are destined, and you can't cover them up no matter how you use harmless smiles or heartless words. Just like everyone's hidden door, it is invisible but real. Once it is dug out, it will be surrounded by dangers and set on fire.