君子战虽有陈，而勇为本焉；丧虽有礼，而哀为本焉；士虽有学，而行为本焉。
作战虽然讲究排兵布阵，但士兵的勇敢是其中的根本；丧葬虽然讲究礼节，但对亲人的哀思是其中的根本；一个人虽然很有学识，但思想道德、行为举止是其中的根本。
物理学不仅仅是解决问题，它是关于理解现实的本质。
I'm not a rapper, I'm a poet who raps.
我学到的最重要一课是相信自己。
We want to build technology that everybody loves using, and that affects everyone. We want to create beautiful, intuitive services and technologies that are so incredibly useful that people use them twice a day. Like they use a toothbrush. There aren’t that many things people use twice a day.