I know this may appear to be a duplicate question but the other question Straight lines and longest distance doesn't seem to explain in laymans terms. So... I'm trying to understand this but have read loads of stuff about Minkowski space etc but it's still beyond my tiny brain to grasp.
So, would anyone like to tackle this in layman's terms for me please.
The quote I've seen and would like explaining is this..
In space, a straight line describes the shortest distance between two points. In spacetime, by contrast, a straight path yields the longest elapsed time between two events.
I just can't get my head around why the straight line is the longest time in spacetime!