Religion is the reaction of human nature to its search for God

Speech is human nature itself, with none of the artificiality of written language

The science of the mind can only have for its proper goal the understanding of human nature by every human being, and through its use, brings peace to every human soul.

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.