  Mill's version of utilitarianism differed from Bentham's also in that he placed weight on the effectiveness of internal sanctions — emotions like guilt and remorse which serve to regulate our actions. This is an off-shoot of the different view of human nature adopted by Mill. We are the sorts of beings that have social feelings, feelings for others, not just ourselves. We care about them, and when we perceive harms to them this causes painful experiences in us. When one perceives oneself to be the agent of that harm, the negative emotions are centered on the self. One feels guilt for what one has done, not for what one sees another doing. Like external forms of punishment, internal sanctions are instrumentally very important to appropriate action. Mill also held that natural features of human psychology, such as conscience and a sense of justice, underwrite motivation. The sense of justice, for example, results from very natural impulses. Part of this sense involves a desire to punish those who have harmed others, and this desire in turn “…is a spontaneous outgrowth from two sentiments, both in the highest degree natural…; the impulse of self-defense, and the feeling of sympathy.” (Chapter 5, Utilitarianism) Of course, he goes on, the justification must be a separate issue. The feeling is there naturally, but it is our ‘enlarged’ sense, our capacity to include the welfare of others into our considerations, and make intelligent decisions, that gives it the right normative force.