I am truly inspired by your concept of a person who can remember their past self and envision their future self. According to my understanding, our minds exist in the dimension of time, allowing us to traverse the past, be present in the moment, and venture into the future through the power of our thoughts. Our thoughts possess an incredible swiftness, surpassing even the speed of light, enabling us to manipulate the timeline and shape our own reality. This suggests that we are, in essence, beings of the fourth dimension, courtesy of the incredible capabilities of our minds.