There is no fundamental difference between humans and the higher mammalsin their mental faculties

If I had my life to live over again, I would have made a rule to read some poetry and listen to some music at least once every week.

The formation of different languages and of distinct species and the proofs that both have been developed through a gradual process, are curiously parallel.

As the sense of smell is so intimately connected with that of taste, it is not surprising that an excessively bad odour should excite wretching or vomitting in some persons.

Life is nearly over with me. I have taken no pains about my style of writing.

Traveling ought also to teach him distrust; but at the same time he will discover, how many truly kind-hearted people there are, with whom he never before had, or ever again will have any further communication, who yet are ready to offer him the most disinterested assistance.

Now when naturalists observe a close agreement in numerous small details of habits, tastes and dispositions between two or more domestic races, or between nearly-allied natural forms, they use this fact as an argument that all are descended from a common progenitor who was thus endowed; and consequently that all should be classed under the same species. The same argument may be applied with much force to the races of man.