I witnessed an experiment in a video. A woman sitting at a table was asked to hold her right arm out, resting it from elbow to hand on the surface. They erected a barrier so she couldn't see her hand and then they placed a rubber hand and arm in front of her, which she could see, with the elbow ending at her body. Then the person sitting on the other side of the table used a soft paint brush to stroke both her hand and the rubber hand. She stated she was feeling a little odd because she was beginning to experience sensation in the rubber hand. When the person moved the brush to the rubber thumb, stroking it but not hers, she jerked back because the feeling was so odd. Then the man across the table pulled out a hammer and hit the rubber hand. You can imagine how the woman reacted! This demonstrated how, in a matter of two minutes or less, a rubber hand became a human hand in the thought of this woman. This is, in essence, what we've done with everything around us. Belief becomes our reality -- and very quickly. So today I will practice moving away from beliefs and opening my thought to the reality of 4th-dimensional thought!
"Mortals evolve images of thought." "Mortal mind sees what it believes as certainly as it believes what it sees. It feels, hears, and sees its own thoughts. Pictures are mentally formed before the artist can convey them to canvas. So is it with all material conceptions."
Mary Baker Eddy - Science & Health Page 86:13 and 86:29:1
“It is because the thoughts you think you think appear as images that you do not recognize them as nothing. You think you think them, and so you think you see them. This is how your ‘seeing’ was made. This is the function you have given your body’s eyes. It is not seeing. It is image making. It takes the place of seeing, replacing vision with illusions.” A Course in Miracles W-15.1:1-7