What it teaches me is the transience of everything. All that seems so absolute, concrete, and permanent, including our entire world and everything that is reality, is ephemeral, transient, and endlessly flowing.
Our language--and everything else--which seem so permanent will eventually become obsolete, incoherent, and ultimately forgotten and lost.
Perhaps Truth exists, but we cannot know It. Perhaps we can glimpse It or something of It.
The most knowable thing to me is this: God = Truth.
That’s one problem with the concept of time travel. Even if you could get there, everything would sound like gibberish. I think Michael Crichton addressed that.