The story is told of a woman waving good-bye to one of her children as they were leaving for school, and calleld out, “Remember who you are.” As the child walked away, the friend asked, “Why does your mother always say that to you? What does she mean?” “She means, ‘Be good.’” was the child’s reply. That is exactly right. We remember who we are by doing good, and we do good when we remember who we are.
And now, my sons, I would that ye should remember to search them diligently, that ye may profit thereby; and I would that ye should keep the commandments of God, that ye may prosper in the land according to the promises which the Lord made unto our fathers.
Source: Mosiah 1:7; The Book of Mormon: Another Testament of Jesus Christ