If a jewel falls into the mire, it remains as precious as befour; and though dust should ascend to heaven, its former worthlessness will not be altered.
宝石及时落在泥潭里,仍是一样可贵;尘土纵然扬到天上,还是没有价值。
There is no royal road to science, and only those who do not dread the fatiguing climb of its steep path have a chance of gaining its luminous summit.
在科学上没有平坦大道,只有不畏劳苦沿着崎岖之路攀登的人,才有希望大道光辉的顶点。