The habits of feeling, action and judgment that comprise good character depend on personal self-discipline and powerful aspiration to become a good person, all of which must be drawn from within.
Babies are born with neither good nor bad character. Normal people - as they grow, learn and are trained - develop better or worse dispositions and habits of conduct.
We are born with a potential for good character - and for the dispositions and habits that make up bad or weak character. Because we are born in ignorance of moral ideals, however, we must be instructed or trained if we are to achieve a good second nature.