傻子的心只有笨蛋能懂
[shă zi de xīn zhĭ yŏu bèn dàn néng dŏng]
The heart of a 'fool' can only be understood by a 'numskull.' It suggests deep, perhaps painful or misunderstood emotions that only another 'silly person' could understand. A mix of frustration, affection, or sadness.