I reckon there's as much human nature in some folks as there is in others, if not more

No author ever drew a character consistent to human nature, but he was forced to ascribe to it many inconsistencies

His works (taken together) are almost like a new edition of human nature.

There is a hearty Puritanism in the view of human nature which pervades the instrument of 1787 It is the work of men who believed in original sin, and were resolved to leave open for transgressors no door which they could possibly shut.

You know, it's almost human nature. If you give me a gift, I feel indebted to you... assuming it's a substantial gift.

Human nature is above all things—lazy.