The clouds in the sky are unpredictable every second, and they can bring us vast tranquility whenever we look at her. Just like our life, from the immature innocence of childhood to the ignorance of youth, to the ultimate enlightenment when the dust of life has settled. All the joys in our life, all the partings, all the storms that come unexpectedly, and the beautiful rainbows that persist after persistence, are all in this world.