《资治通鉴·汉纪·汉纪二十三》
听他们说的，滔滔不绝于耳，就好像可遇可求一般；若求真起来，却渺渺茫茫如望风扑影，终究什么也得不到。
听其言，洋洋满耳，若将可遇，求之，荡荡如系风捕景，终不可得。
When we listen to what they have to say, their words are endless just like a vast river. However, when we try to truly seek it, it's just like mist that we can't catch, and in the end we end up with nothing.