Philosopher Joshua Knobe recently posed a perplexing question in contemplating the nature of the self: If the person you will be in 30 years — the person for whom you plan your life now by working toward career goals and putting money aside in retirements plans — is invariably different from the person you are today, what makes that future person “you”? What makes them worthy of your present self’s sacrifices and considerations? That’s precisely what Harvard psychologist Daniel Gilbertexplores in this short and pause-giving TED talk on the psychology of your future self and how to avoid the mistakes you’re likely to make in trying to satisfy that future self with your present choices. Picking up from his now-classic 2006 book Stumbling on Happiness (public library), Gilbert argues that we’re bedeviled by a “fundamental misconception about the power of time” and a dangerous misconception known as “the end of history illusion” — at any point along our personal journey, we tend to believe that who we are at that moment is the final destination of our becoming. Which, of course, is not only wrong but a source of much of our unhappiness.