If I'm moving through MY reference frame at the speed of light, isn't time still passing by normally for me?
Help me think about this fourth dimension- space-time. I want to intuitively understand it. I understand some thought-experiments (Einstein's train experiment, for example, and why events occur slower/later for people that are farther away or moving from the event because of the infinitesimal amounts of time it takes for light to travel to them).
Another question I could ask here is what caused you to understand space-time when you finally got it (if you didn't immediately get it).