Marijuana is thought to be harmless because the effects from is are not so damaging immediately. You will not smoke so much you throw up, and pot poisoning or overdose does not happen that I know of. You can probably drive okay, although I would not recommend it. It seems to be an okay way to slip away from this world. This is where the damage begins. As someone who craved not feeling like I did, daily use of pot was enjoyable. Firstly, It drug me away from the cares of the world. With that, also comes laziness, a lack of caring about things. We typically lose drive for day to day things. Secondly, we tend to lose things. Where are my keys, where is my phone. I know this happens in everyday life, but it is so much more so for the daily pot user. Thirdly, and actually dangerously, is anxiety. I describe it as an overwhelming uncomfortable feeling. When we are high, everything is okay. But when sober, we are moody, anxious, short tempered people. I never felt right when the day started, and could not wait to get high that day. When confronted with a challenge, I would lash out, and have high anxiety until the next time I was able to use. I read a report that said during pot use, anxiety goes up, but the "high" feeling blocks it. Then when down, We are faced with an uncomfortable feeling. I once tipped my step sons chair over for something he did when he was a little boy. I could not control it, the drug took my soul. I am not anti-legalization, I am pro-education. Real education, from an addict.