剑鞘保护剑的锋利，自己却满足於它自己的迟钝。
孔子站在岸上指着河水说：“时光的流逝就像这河水一样！日夜不停地流去。”
Scientific rigor is the foundation of everything we do; without it, trust is impossible.
Art should be dangerous, like a knife in the dark.