“Thoughts can represent the lower or bodily level of experience, or the higher or spiritual level of experience. One makes the physical, and the other creates the spiritual. (ACIM, T-1.I.12:2-3)
Father, Your Son is perfect. When I think that I am hurt in any way, it is because I have forgotten who I am, and that I am as You created me.
Your Thoughts can only bring me happiness. If ever I am sad or hurt or ill, I have forgotten what You think, and put my little meaningless ideas in place of where Your Thoughts belong, and where they are. I can be hurt by nothing but my thoughts. The Thoughts I think with You can only bless. The Thoughts I think with You alone are true. (ACIM, W-281.1:1-7)
If you are willing to renounce the role of guardian of your thought system and open it to me, I will correct it very gently and lead you back to God. (ACIM, T-4.I.4:7). 
We said before that the Holy Spirit is evaluative, and must be. He sorts out the true from the false in your mind, and teaches you to judge every thought you allow to enter it in the light of what God put there. Whatever is in accord with this light He retains, to strengthen the Kingdom in you.” (ACIM, T-6.V-C.1:1-3)
A Course In Miracles, ACIM.org