In the world of mortals, what does it mean to keep the fleeting bloom quietly without being defiled?

Keep a pure heart in a complex world, wait for time to pass and bloom beautiful youth. Being in the world of mortals is to keep a childlike heart in a troubled world, free from worldly pollution, while staying still for a while is to wait quietly for the passage of time and bloom your own beautiful youth. The whole sentence means to keep a pure heart in the complicated world, wait for the passage of time quietly, and bloom your beautiful youthful posture. It is a good wish to pursue inner purity, cherish time and face life positively.