It is your thoughts alone that cause you pain

It is your thoughts alone that cause you pain. Nothing external to your mind can hurt or injure you in any way. There is no cause beyond yourself that can reach down and bring oppression. No one but yourself affects you. There is nothing in the world that has the power to make you ill or sad, or weak or frail. But it is you who have the power to dominate all things you see by merely recognizing what you are.

~ Jesus, A Course in Miracles