http://viewonbuddhism.org/karma.html It is "my mind"

what creates "this world".
KARMA—THE FRUITS OF OUR LABORS
What is the relationship between our behavior in this life and our future existences? The Buddha observed relationships that exist from one life to another by using his own mind as a research instrument, finely honed by Contemplative Discipline.
Karma means action and it refers specifically to intention. Intention, (the intention itself and the intended action), is a mental factor that directs one’s awareness to a given object or a given activity.
Whenever we engage in intentional activities of body, speech and mind, whether wholesome or unwholesome, impressions are placed upon our mindstreams. They are like seeds or potencies and are called karma. In certain situations, these seeds act as propulsive karma. This karma is imprinted upon the subtle mindstream that carries on after death. When it is stimulated by an appropriate catalyst, it propels one into another rebirth. As the seed bears fruit, it is fully ripened into a type of life-form that reflects this seed-potential.
The karmic results are from both behavioral and environmental causes. Behavioral results refer to patterns created in one life that carry over into the next. For instance, habitual ways of responding to life’s circumstances, ie. , attachment, hostility, equanimity or anxiety. These positive or negative behaviors can be accentuated and built upon from one lifetime into another.
Environmental results of karma follow the principle that what we put out into the world comes back to us. As we have sown, so shall we reap. When a human dies and is propelled into rebirth, it is not the former human being who dwells in the new body. The subtle mindstream that departs at death is not a human consciousness. That ‘I’ that was designated on your present body and mind, vanishes. This continuum of awareness is now able to join with a new human life. It is like when a candle burns out and a new candle is lit. It is really a transfer of energy and not the same candle. It is the heat of desire that re-embodies. Our passionate desire for survival is heat. It is simply a transfer of energy.
When asked, ‘what happens to enlightened beings after they pass on?’, the Buddha had the questioner build a fire and then add sticks to the fire in order to keep it burning, and then stop adding sticks and the flame went out. The heat was no longer compelling them to re-embody, but they had a choice to re-embody, through their Great Compassion for all sentient beings.
Karma is our Judge. We need to have recourse to our inner judge.
MOMENT-TO-MOMENT KARMA
Buddhism states that man can become his own master. This is the goal-to reach self-mastery. Mind is the creator of our world, in every moment. That is why responsibility is so crucially connected with our mind.
MAKERS OF OUR OWN DESTINY.
I am the owner of my karma, everything else is on loan. We can only take karma with us. We bring tendencies with us that create our opportunities. The choice us ours, constantly, every single moment.
http://www.reversespins.com/tibetanbuddhism.html