There are clouds in the sky, and people gather and disperse, which shows that the world is changeable and life is as unpredictable as clouds in the sky. "There are clouds in the sky, and there is gathering and scattering on earth" is an idiom, which can also be understood as the experience and course of life, like the clouds in the sky, sometimes the scenery is infinite and sometimes it is bleak. Gathering and dispersing is a necessary process in life. Sometimes we get together, but sometimes we have to be apart. This idiom is often used to describe the joys and sorrows in life, reminding people to cherish the present, seize the opportunity and cherish the feelings between people.