“I am affected only by my thoughts.”
We have talked about the mechanics of the mind. The interface called the mind, when given a thought, translates that thought into an image you think you see in the world “out there”. The mind builds things with the thoughts you provide it with. What thoughts will you offer to it? The quality of the thoughts you allow your mind to munch on decides the quality of your life experience in this world.
When you fail to decide on any thought, the mind will pick up the thoughts of the ego thought system that happen to swirl by and you will be at the mercy of the projections that they cause. When you focus your mind on the good and the lovely, then that is what the mind will extend. You will benefit twofold: your inner space will be joyful and at peace and the images you will see in the world will speak of Joy and Peace as well.