江山易改，禀性难移
jiāng shān yì gǎi，bǐng xìng nán yí
基本释义
  1. 人的本性的改变，比江山的变迁还要难。形容人的本性难以改变。
出处
明·冯梦龙《醒世恒言》第三十五卷：“看官有所不知。常言道得好，江山易改，禀性难移。”
英文翻译
  1. It's easy to change rivers and mountains but hard to change a person's nature
  2. a fox may grow grey,but never good
  3. a sow,when washed,returns to the muck
  4. it is hard to change man's natural disposition than to change rivers and mountains