Originally Posted by punkworld

Sleazy, you're wrong.

As mentioned before, neurotransmitters play an immense role in determining moods and states of mind. Anyone who has ever tried drugs (including alcohol) should know that.

But aside from nature, nurture also is something which plays a large role in determining the personality and thus states of mind and moods of an individual. How you are raised determines how you learn to deal with emotions. And just like someone who has never been taught how to write will not suddenly create MacBeth, likewise, someone who has never learned how to deal with emotions in a positive way will not just suddenly be able to do so.