Rich people constantly learn and grow, Poor people think they already know

One thing that I learn from observing the lifestyle of the riches are that their house is usually full of books. Tons of them. These groups of people usually love to read. But, in the other hand if you go to a 'not so rich' people, you can hardly find any books. So, I think the statement 'Rich people or success people constantly learn grow, poor people think they know it all' is quite true. The more you read books, the more you know how limited knowledge you have and therefore the more hungrier you become for acquiring knowledge. This is a pattern that will lead you to the key of success.