It is imperfection instead of perfection that dominates in day-to-day life, which is similar to the common sense that the moon is seldom full while often waning. 百度教育团队【海纳百川团】
Don't take it for granted that life can be perfect because it is the opposite that represents the reality. The moon is sometimes full and sometimes half-full, but most of the times, you will see a hook that sighs.