Renunciation is the very basis upon which ethics stands. There never was an ethical code preached which had not renunciation for its basis.
Ethics always says, “Not I, but thou.” Its motto is, “Not self, but non-self.” The vain ideas of individualism, to which man clings when he is trying to find that Infinite Power or that Infinite Pleasure through the senses, have to be given up–say the laws of ethics. You have to put yourself last, and others before you. The senses say, “Myself first.” Ethics says, “I must hold myself last.” Thus, all codes of ethics are based upon this renunciation; destruction, not construction, of the individual on the material plane.
These two beautiful quotes are of Swami Vivekanada. It’s so true that your senses will always say, myself first whereas ethics will say, myself last.