Mind

Something to think about,

' aape beej aape hee khavoh,Nanak hukmee aavoh jaavoh'

You harvest and eat what you sowed,

and then as per the divine laws you are subjected to the law of transmigration.

It is what you feed your eternal soul that shall accompany you to the future birth or births by the law of reincarnation.The mortal body will perish here .You shall have good or bad birth(human/animal or lower form of life) and life (with or without suffering) based on the essence of your being that you sowed during the life as a human being. To what level you raise your conciousness in this life is your only passport to good future lives ,unless of course your conciousness becomes so highly evolved that it breaks out of the cycle of reincarnation.
The food for soul is your thoughts ,that builds your character and is the driver of your ACTIONS.
The highest goal for you to achieve, is Thoughts and actions free from LUST, ANGER, GREED, ATTACHMENT, EGO.
If we take little steps towards achieving the lofty goal, I am sure sooner or later we could reach there. If not ,then at least we would be sowing better seeds. Nothing to lose anyway.
The Good Life that we are enjoying in this lifetime is a result of some good seeds sowed in the past. So make your choice, we have the power to better the stakes or flush it down the loo.