To our ancestors, such an odd eccentric instant was without significance - did not even exist. In inventing the locomotive, Watt and Stevenson were part inventors of time. An inch of time cannot be bought with an inch of gold. The biggest difference between time and space is that you can't reuse time. Merrick Furst Time is a measure of the interval between two events.
Simple concepts are often the most difficult to explain.
Many times, there's one notion that we carry around with us and another, more technical and specific, that's used in physics. Now tell me again what time is. Well, of course it is. Otherwise I wouldn't have written it down. Time in the physical sense is always relative and never absolute.