达尔文的各种特质中,让他成为最伟大科学智者之一的,是他执著的个性。面对自然史中令人望而却步的问题时,达尔文会执著地挑战,直到解开秘密。达尔文的儿子弗朗西斯忆起父亲的性情:“以固执形容他的个性,似乎要比不屈不挠更好。不屈不挠难以表达他追求真理时那股近乎狂热的欲望。” Of all the hallmarks of Darwin, making him one of the greatest wise men of science is his persistent personality. In the face of the daunting problems of natural history, Darwin will be persistent challenge, until the unraveling. Darwin’s son, Francis, recalled his father’s temperament: “It seems to be stingy to describe his personality as being better than he is indefatigable, and indomitable enough to express his almost fanatical desire to pursue the truth.” "