Special relativity makes time slow down for matter objects as they move faster to keep the speed of light constant. Einstein didn’t explain why, but here it is because moving faster increases the quantum network load. Our game of life slows down under load for the same reason that a game screen slows down when there is a big battle (2.3.1).
His example of an astronaut who returns after years of high-speed space travel to find that his twin on earth is an old man then could happen. Experiments confirm that a muon traveling at 99.5% of the speed of light, which should travel 300 meters in its millionth of a second life, actually travels 3,000m, so speed extended its life tenfold. Relativity lets a rocket accelerating at one g go to our nearest galaxy and back in 60 years, but it would return to an earth that is four million years older (Harrison, 1986, p157). For the rocket crew, time would pass as usual, but as thousands of years pass on earth for each of their years, they are actually in slow motion.
Relativity implies that time stops at the speed of light, so a matter clock sitting on a photon wouldn’t tick at all. Light from the Andromeda galaxy takes 2.5 million of our years to arrive on earth but according to relativity, no time at all passes for the light itself. It also starts and ends its journey at the same location by length contraction! Needless to say, this makes no sense, as how can light move at all if its time stops? It can’t, so matter time doesn’t apply to light.
Time passes for matter when it doesn’t move, so life events can occur, but light never stops, so its time doesn’t pass that way. If light is a wave that spreads, its time passes for every network tick, but for matter as a standing wave, its time passes as life events occur. Time for light is then absolute, based on quantum cycles, while time for matter is relative, based on life events. Light is the ultimate messenger because it moves absolutely, at the speed limit of our universe.