Abraham Lincoln: “Human action can be modified to some extent, but human nature cannot be changed.”

If I were to try to read, much less answer, all the attacks made on me, this shop might as well be closed for any other business.

Important principles may and must be inflexible.

I do the very best I know how--the very best I can; and I mean to keep doing so until the end.

As a general rule I abstain from reading the reports of attacks upon myself, wishing not to be provoked by that to which I cannot properly offer an answer.