君子有三种快乐，但称王天下不在其中。父母都健在，兄弟没有灾祸，这是第一种快乐；抬头无愧于天，低头无愧于人，这是第二种快乐；得到天下的优秀人才而教育他们，这是第三种快乐。

拓扑学是对图形在任何变形下保持不变的性质的研究。

与同伴保持良好的关系的愿望，即所谓的人类联合本能，轻易地超过了单纯的个人利益和理性逻辑。

"The stories we tell ourselves shape the world we live in."

Great design solves problems you didn't know you had in ways you never expected.

Among thousands of people, you meet those you've met. Through thousands of years, across the boundless wilderness of time, you happen to meet them, neither earlier nor a bit too late. There is nothing to be said except to ask lightly, "Oh, you're here too?"