I think I get what you're saying, and I think a better wording would be 'normal' over 'natural' - because some peoples natural state is deplete or overridden (imbalanced). Given cannabis' interaction with us, I do think it's a plausible way to healthily rebalance ourselves. However I think there is possibly other more effective ways with regard to brain chemistry. Incidentally what you have stated is eerily accurate to me, and in that instance cannabis has merely been a welcome distraction and in some way has helped me to veer from negative thoughts. But without trying other medicines I can't really comment on true healing potential. It's helped me help me, but I wouldn't go so far as to say it has cured me of negative thoughts. I think that is always a potential and it is ultimately up to us to avoid thinking detrimentally. In this realm of contrast there will always be someone you can label negative, it's all perspective.