As an ex-smoker of 16+ years (daily), I can tell you one thing. Cannabis does not 'open you mind', in fact it does the opposite. You may well sit there at home or with friends stoned and talk about stuff that you may not have otherwise and believe that you are wise, but you are not. One day that will dawn on you.
I guarantee one thing for any daily smoker, that is that one day it will not do what it once did anymore and you will slowly learn that it has prevented you from achieving things that you may have done if you did not smoke. I still have a few friends that still smoke daily after 15 years and not one of them has achieved their potential.
I have no doubt at all that there are medical benefits, but as a recreational drug I class it as the worst one of the lot, and I have been there and done it with the lot of them. Whilst it may not be the most addictive, or the most dangerous, the fact that it is classed as one of the lesser illegal drugs to me is rubbish. The simple fact that it is deemed less dangerous makes people think it is safer to do on a regular basis and that is what makes it so harmful. Only alcohol, or those with addictive personalities that move onto harder drugs daily are worse, and cannabis is the start.
When you see good friends get sectioned for this so called 'safe drug' you should know that it is not safe at all.