过去是你记得的，你想象你记得的，你说服自己记得的，或者你假装记得的。
The past is what you remember, imagine you remember, convince yourself you remember, or pretend you remember.
In mathematics, the art of proposing a question must be held of higher value than solving it.
幸福就像一只蝴蝶：你越是想抓住它，它就越飞走。但如果你停止追逐，它可能会落在你身上。
人生中唯一真正的失败是不忠于自己所知道的最好的东西。
The rocks we extract today build the infrastructure of tomorrow.