Anything that moves at the speed of light, including light itself, doesn’t experience the passage of time. It’s tempting to ask yourself what it would be like to travel at that speed. (Apparently Einstein wondered about this when he was in high school.) The short answer is that there is nothing “it would be like” to travel at the speed of light; if somehow you could do it, you wouldn’t experience the passage of time, so you wouldn’t have any perceptions or conscious thoughts at all.
