Most beliefs come from childhood, accepted without question. The speaker argues you should evaluate each one: does it help you reach your goals, or does it cost you more than it's worth? Apply the same test to relationships and habits.
Chapters
We question all of our beliefs except for those that we truly believe and those we never think to question. A lot of the things that we do, especially when you're younger, came from people that you don't even know. You were 6 years old and someone said— they just made a statement of truth. And because you're learning about the world, you incorporate that and you say, oh, this is how the world is. But it's usually just not true. It's just another 28-year-old fuck-off who has no idea what they're saying and just talks to a 6-year-old. Right. But that becomes a worldview and then it becomes very difficult to extract that out and be like, actually, I think this is false. I don't think this serves me. And fundamentally, you can apply that to relationships, you can apply that to behaviors, and just say like, does this person, this friend of mine in my life, does it increase the likelihood I hit my goals? If yes, then maybe it's worth keeping that relationship relative to the cost. Maybe they do increase the likelihood of you hitting your goals, but maybe the cost of that relationship is they want to talk to you every night.