祸福无常

禍福無常
huòfúwúcháng
disaster and happiness do not follow rules (idiom); future blessings and misfortunes are unpredictable

CEDICT

祸患与福分没有一定的法则。明．孙梅锡《琴心记．第三九齣》：「祸福无常，忧喜难定。」也作「祸福靡常」。

重編國語辭典

Entry Composition

1 祸福 huòfú disaster and happiness
2 无常 wúcháng
  1. variable
  2. changeable
  3. fickle
  4. impermanence (Sanskrit: anitya)
  5. ghost taking away the soul after death
  6. to pass away
  7. to die