It's the nature of man to ask questions. --Belgarath
Nature of man is not what he was born as, but what he is born for.
It is a part of the nature of man to resist compulsion.
Cursed is everyone who places his hope in changing the nature of man
There is no revolution that can change the nature of man
Raw toast," Lucas said grimly, shaking his head. "It goes against the very nature of man.