There have been studies done on how marijuana affects memory. In some ways it decreases certain memory functions, and others it increases. Short term memory is decreased and little new learning happens. Long term memory usage increases. People for example can say more words that begin with the same letter while high than sober. In essence, you become more aware of you and less aware of others. You'll tend to be more self aware and concentrate on what's preventing things from happening in your life. The government is a major controller in everyones life, so you'll tend to focus on that. If you smoked in high school, you'd probably be likely to focus on parents and teachers.
Which goes to show you why not many stoners actually accomplish things. You may think you're becoming wiser, but with less new learning, you only keep rehashing the old. You must learn more to become wiser. While weed may be fun and help you cope, it hampers any true real learning.