You don't know about me, without you have read a book by the name of 'The Adventures of Tom Sawyer,' but that ain't no matter. That book was made by a Mr. Mark Twain, and he told the truth, mainly.

It usually takes me more than three weeks to prepare a good impromptu speech.

All men have heard of the Mormon Bible, but few except the "elect" have seen it, or, at least, taken the trouble to read it. I brought away a copy from Salt Lake. The book is a curiosity to me, it is such a pretentious affair, and yet so "slow," so sleepy; such an insipid mess of inspiration. It is chloroform in print. If Joseph Smith composed this book, the act was a miracle — keeping awake while he did it was, at any rate.

Always do what is right. It will gratify half of mankind and astound the other.

I am not interested to know whether vivisection produces results that are profitable to the human race or doesn't...The pain which it inflicts upon unconsenting animals is the basis of my enmity toward it, and it is to me sufficient justification of the enmity without looking further.

In religion and politics, people's belief's and convictions are in almost every case gotten at second hand, and without examination

There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact.