Grant Sanderson's graduation speech questions the popular advice to "follow your dreams." He argues that while passion matters, true career success is built on the ability to add value to others. After college, he suggests the focus should shift from personal growth to making meaningful contributions to society. Sanderson encourages graduates to find where their skills can meet societal needs, highlighting that passion often develops through action. He also stresses the importance of being adaptable in a constantly changing world, which is essential for navigating an uncertain future.