"To discriminate against a thoroughly upright citizen because he belongs to some particular church, or because, like Abraham Lincoln, he has not avowed his allegiance to any church, is an outrage against that liberty of conscience which is one of the foundations of American life. You are entitled to know whether a man seeking your suffrages is a man of clean and upright life, honorable in all of his dealings with his fellows, and fit by qualification and purpose to do well in the great office for which he is a candidate; but you are not entitled to know matters which lie purely between himself and his Maker. If it is proper or legitimate to oppose a man for being a Unitarian, as was John Quincy Adams, for instance, as is the Rev. Edward Everett Hale, at the present moment Chaplain of the Senate, and an American of whose life all good Americans are proud then it would be equally proper to support or oppose a man because of his views on justification by faith, or the method of administering the sacrament, or the gospel of salvation by works. If you once enter on such a career there is absolutely no limit at which you can legitimately stop."

“There is much talk about "jingoism". If by "jingoism" they mean a policy in pursuance of which Americans will with resolution and common sense insist upon our rights being respected by foreign powers, then we are "jingoes".”

“I don’t go so far as to think that the only good Indian is the dead Indian, but I believe nine out of every ten are, and I shouldn’t like to inquire too closely into the case of the tenth.”

“The most vicious cowboy has more moral principle than the average Indian.”

“By God, if you try anything like that, I'll kick you, I'll bite you, I'll kick you in the balls. I'll do anything to you — you'd better leave me alone.”

“When a judge decides a constitutional question, when he decides what the people as a whole can or cannot do, the people should have the right to recall that decision if they think it wrong. We should hold the judiciary in all respect; but it is both absurd and degrading to make a fetish of a judge or of anyone else.”

“If there ever was a pursuit which stultified itself by its very conditions, it is the pursuit of pleasure as the all-sufficing end of life. Happiness can not come to any man capable of enjoying true happiness unless it comes as the sequel to duty well and honestly done. To do that duty you need to have more than one trait.”