the truth is you will never life long enough to learn most things because science and everything is moving so fast now no one can keep up. you won't learn everything about everything in a lifetime. economics tells us that by the time you are 40-60 the market should reward you with higher wages by then because you are an expert on something, the truth is that is a minority. most people do several jobs and courses and most don't get work and courses don't count as much as work. you can't be well educated and work as well, or exercise even so more clever academics are fat and poor. so that is so crazy. you can be a very poor expert at 40 or 100. while the world gives kids of 5 work you know and 15 year olds are having kids. some 20-25 year olds rule the world and fall quick once they turn about 21-24. and your banged completely by 30. no one wants to know you at all. its laughable.