Human nature refers to what is in people but which they cannot study or work at achieving.
If the quickness of the mind and the fluency of the tongue are too punctilious and sharp, moderate them in your activity and rest.
If the gentleman has ability, he is magnanimous, generous, tolerant, and straightforward, through which he opens the way to instruct others.
The nature of man is evil; what is good in him is artificial.
Man's nature is evil; goodness is the result of conscious activity.
Quarreling over food and drink, having neither scruples nor shame, not knowing right from wrong, not trying to avoid death or injury, not fearful of greater strength or of greater numbers, greedily aware only of food and drink - such is the bravery of the dog and boar.