This video explains that life purpose is not something found externally but is an internally felt and quantifiable state. Dr. K, drawing from Self-Determination Theory and the work of Viktor Frankl, outlines principles for cultivating purpose, emphasizing making personal choices, stretching one's capacities, fostering relatedness, and managing the perception of control through active challenges. The video also touches on how a lack of purpose can contribute to addictions and explores techniques like dereflection and paradoxical intention to help viewers find meaning.