Selfishness means the quality or state of being selfish and selfish means lack of consideration for other people. It is having more concern for yourself than for others. A selfish man aims at obtaining as much happiness as he can for himself and does not care whether other people are happy or unhappy. In order to attain his object, he tries to appropriate as large a share as possible of the good things of this world. It may be accompanied by a lack of empathy. Selfishness is the opposite of selflessness. It is also different, though related, to self-centredness and self-affirmation. Many psychologists approve of a healthy level of selfishness, in order for some people to stay happy.