"We become what we want to be by consistently being what we want to become each day. Righteous character is a precious manifestation of what you are becoming. Righteous character is more valuable than any material object you own, any knowledge you have gained through study, or any goals you have attained no matter how well lauded by mankind. In the next life your righteous character will be evaluated to assess how well you used the privilege of mortality.
Neither Satan nor any other power can destroy or undermine your growing character. Only you could do that through disobedience. A sterling character is converted into worthless ashes when eroded by deceit or transgression.
Strong moral character results from consistent correct choices in the trials and testing of life. Such choices are made with trust in things that are believed and when acted upon are confirmed."
-Elder Richard G. Scott. "The Transforming Power of Faith and Character." October 2010.