Life Long Education
While many people think about education as being the formal process that starts with grade school, high school, and ends at some point with graduating from a college or university, few take the process farther. I'm not talk about graduate school, but rather the process of continuing education that should never stop as we grow older. There are always new things to learn, even if you become an expert in your chosen field. There are also things to learn out side your main area of study or expertise. The more you lean the more rounded your education becomes and the more insight you gain into other areas of study.
Learning For Better Jobs
One reason to continue your education is to qualify for better jobs and more money, but the other reason is to keep your mind sharp. Like other muscles of the body, the mind needs to keep being exercised to keep in shape. Even if you learn and study things for fun it is in your best interest to keep learning your whole life long.