对认可的渴望，灵魂中的激情部分，是灵魂中最具政治相关性的部分。

Economics is ultimately about improving human welfare.

Science is not just about theory; it's about making things that work in the real world.

The beauty of topological insulators lies in their robustness; their surface states are protected against disorder and imperfections.

司马牛问君子。孔子说：“君子不忧不惧。”问：“不忧不惧，就能叫做君子吗？”孔子说：“问心无愧，何来忧惧？”