with other drugs (heroin, cocaine, meth, etc.) there are immediate health risks, physical deterioration, and possible death by way of overdose or other complications, that will make the user want to stop. With weed, there are none of these concerns. There is no real reason to ever quit weed. To take breaks, sure, but to quit for life? Why? unless you're being randomly drug-tested there's no reason to. And thats how it gets you. I'm not bashing weed, I LOVE IT, but after a 2-month break of seriously trying to quit i'm back smoking it everyday, and i notice my quality of life has drastically improved.