Memory isn't attention. Sometimes we may think we know or are aware of everything, but someone else comes along to show us that we still have much to learn. He feels he has been wasting his time, so he has to study for another 10 years. It's my opinion that an adult can never obtain full awareness, unless He or She is reared from parents with this developed state of mind. Maybe I'll give it a try after I get back from the shopping mall.
People take it too seriously.
Let me know.