Hi, I think what Farsight meant was that since light is the limit of what anything can travel, and because of the phenomena that light has which is that regarless of the speed something is traveling at, light will always approach it at the speed of light.
So, because of this, time varies in different places. If you have a person measuring time with a clock in a spaceship moving 1/4th of the speed of light... and you have another person with a similar clock measuring time on earth, the person on earth will measure time faster than the person traveling 1/4th of the speed of light. And if they both start to cook 15 minute rice, the person on Earth will finish much faster. And this is assuming that there are no defects on the clocks or microwave.
Now since we have these two scenerios, which are measuring time with similar clocks, yet both are inconsitent with each other. The differnece in measurement of time here would be related to the difference in their motion and to that of the speed of light.