The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when it be obeyed.
一个科学家的真正价值是由他思想的独创性来衡量的。
The best way to predict the future is to create it.
言:言谈。称:称扬。汤文:汤,成汤,商朝的建立者;文,周文王姬昌,商末周族领袖。行;行为。譬:比如。豨:猪。这两句大意是:言谈必称扬商汤周文,行为则比如猪狗一般。这两句以言美行恶的反差对比,十分典型地概括出那类言行不一的人的低下品格,可用以形容说的一套,做的又是一套的虚伪可耻的两面派人物。此处还有一个成语:行同狗豨,意思是人的行为丑恶,如同猪狗一样,形容人的行为卑鄙恶劣到了极点。