Sean M. Carroll Fact Quotations

The particular aspect of time that I'm interested in is the arrow of time: the fact that the past is different from the future. We remember the past but we don't remember the future. There are irreversible processes. There are things that happen, like you turn an egg into an omelet, but you can't turn an omelet into an egg.

Nothing in the fact that there was a first moment in time necessitates that an external something is required to bring the universe about at that moment.