There is no absolute time. Time passes differently in different parts of the universe, and events only have partial ordering. Rather than the world being composed of things, the world is composed of events and their relationships to each other. We are simply fleeting collections of atoms that remain together for a particular period of time. And there are a couple things that create our notion of time:
- In the physical world, what drives our notion of time is the constant increasing in entropy. ΔS ≥ 0. In a system, the total amount of disorder never decreases. This is what gives us our notion of time, evidence that we can see things changing. Change is what we see and deduce as time. When heat death occurs and maximum entropy has been reached, time will no longer pass.
- On the scale of ourselves, what drives our notion of time is our memory. We tend to think that time is divided into 3 distinct portions: the past, the present, and the future. But we do not simply take the present purely as it comes, it is undoubtedly influenced by our memories of the past, which are concretized in our neurons and synapses that build up myelin. When we hear the 100th note of a great song, it is not just that that we are hearing. Our perception of that note is taken in context with every note in the song that has led up to that point.
- Reality is often not what it seems. It would appear that the sun revolves around the Earth, but we have learned that it is instead the Earth that spins. It would appear that the Earth is flat but it is in fact spherical.
- Time is not global—there is no absolute time and time passes differently everywhere.
- Between this past and this future there is an interval that is neither past nor future and still has a duration: fifteen minutes on Mars; eight years on Proxima b; millions of years in the Andromeda galaxy. It is the expanded present.
- Every event has events that in the future, events that are in the past, and events that are neither in the future nor the past. Just like how people have ancestors, descendants, and people who are neither their ancestors nor descendants.
- Don't take your intuitions and ideas to be "natural": they are often the products of the ideas of audacious thinkers who came before us.
- Sooner or later everything returns to dust.
- My name, Austin, designates nothing more than a collection of relations and events.
- Our notion of (past → present → future) turns out to be only an approximation of a much more complex reality.