Man can act only on external and visible characters: Nature, if I may be allowed to personify the natural preservation or survival of the fittest, cares nothing for appearances, except in so far as they are useful to any being.

人只能根据外在和可见的特征采取行动：如果允许我将自然保护或适者生存拟人化，大自然对表象毫不关心， 除非它们对任何生物都有用。