Thanks for that clarification. But the speed of light can only be measured relative to YOU That's still wrong, though. The speed of light is an absolute; it's

Thanks for that clarification. But the speed of light can only be measured relative to YOU That's still wrong, though. The speed of light is an absolute; it's not My Speed + the Speed of Light. The person I was who originally responded to me (ars) was trying to say that motion in space is impossible because it's always relative -- apparently even to the speed of light. That's not true; motion is relative to the speed of light, period. And what I had been trying to express (however badly) was that the faster you move relative to the speed of light, the slower you move in time. I think ars was just in a nitpicky mood and was fixating on the particular wording I chose.