The speaker references the work of Oliver Burkeman, specifically mentioning his book '4,000 Weeks.' This is a purchasable book.
he has this idea from 4,000 weeks which is uh choose what you're going to suck at yep
""The speaker references and summarizes the core concept of '4,000 Weeks,' where Burkeman discusses that humans need to embrace the limitations of time and focus in on few endeavors."