The seabbard is content to be dull when it protects the keenness of the word.
剑鞘保护剑的锋利，自己却满足於它自己的迟钝。
Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.
不要认为通过隐藏证据来产生信仰是值得的，因为证据肯定会被曝光。
To be a philosopher is not merely to have subtle thoughts, nor even to found a school, but so to love wisdom as to live according to its dictates.