Improve ideological understanding, change ideological concepts, establish a correct world outlook, outlook on life and values, set up lofty ideals, set up lofty aspirations, constantly improve ideological realm, consciously cultivate noble hobbies, consciously stay away from vulgar tastes, and establish a correct concept of honor and disgrace. You can't change your mind and do things that are detrimental to your personality because of personal interests and temporary gains and losses.