This is about having a sense of purpose. It's interesting that Chalmers talks about kindness, love and mercy and that he doesn't talk about financial success, professional achievement or impressing others:
Live for something! Do good and leave behind you a monument of virtue that the storm of time can never destroy. Write your name in kindness, love, and mercy on the hearts of the thousands you come in contact with, year by year, and you will never be forgotten. Your name, your deeds, will be as legible on the hearts you leave behind, as the stars on the brow of evening. Good deeds will shine as the stars of heaven.