This is a bit of a tangent, but the idea of "moving through time" always struck me as a little weird, because the concept of motion is dependent on time already

This is a bit of a tangent, but the idea of "moving through time" always struck me as a little weird, because the concept of motion is dependent on time already. I like to think of things having a shape that exists along the time axis in addition to the spacial ones. The 4D shape of a thing is fixed, but captures within itself what we perceive as motion in 3D space.