Addictions are in the Mind!!
It's all about mind is playing game... releted to thinking to have more then others makes us happy and less then others makes us unhappy..
Either in finance, education, leadership, knowledge connection in society etc.
now in today generation alcohol, drugs, sex addiction become needs and once person get addicted, he or she doesn't realise that what is normal way to feel happy
Alcohol, drugs, sex addiction and other habits mainly serve to stimulate excitement, to loosen inhibitions and later on in life is serves to the depression!
Also other sense attachment like sex, over eating, gambling, shoping, too much talking, too much attachments with material needs and illusion in spirituality... meaning attachment to ego, habit of not getting rid of the unwanted things etc., Follows the similar patterns.
Now with addiction..
Ofcourse we always think or talk about that we have overcome a certain attachment or addiction, still the sense say's one more time, who cares, like attitude ..oh yes again and again and again until the sense doesn't support us for some medical reason or become to closed down or slow down itself in old age! but what has happens??
Still the memories pops up like bubbles in our mind at any times... so if we never learned discipline to let go of them, then ultimately result ends up in depression!!
Yes, its so hard to let go because it is so exciting!
But with little awareness and daily meditation it is possible to overcome some addiction or attachments.
that is why meditation and withdrawing life energy from the sense is very important!
We can't change memories, but we can stop reinforcing them atleast!!!
So How to understand this..
In the Bhagvad Gita this battle is powerfully described.