Cut and paste for ya. Just knowing this doesn't make you smart. Like asking a physicist to fix an engine, just because he can't doesn't make him dumb and does that mean a mechanic who can isn't smart?
One of the methods Einstein used to help formulate his theory of special relativity was to visualize what the universe would look like from the perspective of a photon. Einstein saw that life as a photon would be quite bizarre. For instance, if you were a photon, time would have no meaning to you. Everything would appear to happen instantaneously.
Imagine for a moment that you are a happy little photon created by a star in another galaxy some 4 billion light years away. From my perspective here on Earth, it took you exactly 4 billion years to travel from that star till you reached my retina. From your perspective, one instant you were created and then the next, you are are bouncing off or being absorbed by my eyeball. You experienced no passage of time. Your birth and death happened instantaneously.
This is because time slows for you as your get closer to light speed, and at it, it completely stops. This is also another reason why nothing can go faster than light. It would be like slowing down a car to a stop, and then trying to go slower than completely stopped.
One should think of the speed of light as ‘infinite speed’. A common misconception is thinking the speed of light is just like any other finite speed. The speed of light is only finite from the perspective of the outside observer; from the perspective of a photon, it’s infinite. If you move at exactly the speed of light you could go anywhere, no matter how far, in exactly zero seconds