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 the reason given here is that moving faster increases the load on the quantum network. Our game of life then slows down at high speed for the same reason that a game screen slows down when there is lot of movement in 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 physical life events occur, but light can travel for millions of years without a physical event, so its time doesn’t pass that way. For light, time ticks by as the network passes it on, but for matter, time only passes as life events occur. The definitions are different, so time for light is absolute, based on quantum cycles, but time for matter is based on life events which, as will be seen, don’t occur when it moves. Light then is the ultimate messenger because it never stops for itself, to exist in our time, but constantly moves forward in absolute time, at the maximum speed that our universe allows.