人生是美好的。
Today is cruel, tomorrow is crueler, and the day after tomorrow is beautiful, but most people will die tomorrow night and won't see the sun of the day after tomorrow.
On the way to a grand goal， celebrate the smallest victories as if each one were the final goal. No matter where it ends you are victorious.
解析：事情做得成功了，就引身退去，这是自然的道理。