"Controlling the Mind" by Jagad Guru
Gaze intently at some nearby image in your immediate environment. Now close your eyes and look at the picture of that image in your mind. Try to hold the image in your mind and look at it for quite some time. If it begins to move around, try to steady it; if it begins to fade away, bring it back. This exercise should make it quite clear how hard it is to control the mind—to keep something in your mind that you want to keep in your mind. If you can think thoughts you do not want to think, this further illustrates that you are different from your mind.
Science of Identity Foundation – Jagad Guru Chris Butler