历尽千山未肯休， 一生憾事何处求； 茫茫路，年年秋，日日醉，难解愁。

历史给我们的教训是，人们从来都不知道汲取历史的教训。 What experience and history teach is this — that nations and governments have never learned anything from history, or acted upon any lessons they might have drawn from it.