I came across a topic about learning.

Actually, society is like a big sieve, using cognition to filter out fools, resources to filter out the poor, and rules to filter out honest people.
Teacher Luo Xiang once said: Education can only raise a person's lower limit; its impact on the upper limit is limited.
A person's upper limit depends more on opportunities and insights.
Society starts screening people from the moment they are born; those who pass move up the social ladder, while those who don't stay where they are.