"Since we are always at rest with respect to ourselves, ignoring the effects of acceleration, our lifetime, as measured by us, will always appear shorter than it appears to others. To others our clocks will seem to run slow. But we will die, alas, on the cue of the internal timer that travels with us. In special relativity the grass is greener on the other person's lawn." - Euclid's Window, PG 188 I've been under the impression that when you are moving, your clock will slow down; however, the above passage seems to imply that being at rest is what slows your clock down. What's going on here?