We’ve all had that experience where we see someone we haven’t seen in a long while and notice that they’ve changed. If it’s a child, the change is all the more pronounced, and we’re all the more amazed. But I kind of wonder why that is. Human beings being amazed by time is kind of like fish being amazed by water. We exist in time. We’re in it all the time. It should be pretty ordinary. A fish doesn’t notice water, I suspect, because it was made for it. We notice time, I think, because we weren’t made for it. We were made for eternity, and everything temporal ultimately jumps out at us as surprising. We have mid-life crises because all of a sudden we are forced to say, “Wait a minute! None of this feels right!” And indeed, it isn’t.