Work Step by Step
Here is an analogy. Imagine putting an enormous lump of dough into an oven, with raisins distributed throughout the volume. Imagine you are a fireproof ant sitting on one of these raisins. As the dough bakes and expands, every other raisin would be moving away from you. The same can be said no matter which raisin you are sitting on, i.e., you are not necessarily at the center of the dough.