I, Me, My, Mine, which all refer to SELF. The very nature of self is thought. Thought is response to memory. Through sensations plus thoughts, perception is formed. That perception is actually an image or projection of thoughts. From that image, desire arises. Out of that desire, Self is. So self is actually, thought, memory, image, desire, which all are products of the mind, illusion. They are not real, not actually existing.