That was my question :P

The law of conservation of energy is an empirical law of physics. It states that the total amount of energy in an isolated system remains constant over time (is said to be conserved over time). A consequence of this law is that energy can neither be created nor destroyed: it can only be transformed from one state to another.

So if we observe something, we spend energy to collect that information and store it. Since information cannot be destroyed, it has to go somewhere or change states somehow. When we die, something happens to that information, information about ourselves and all we have learned...

Look at how much energy we use to collect information from light years away, making telescopes and spending so much effort in the process.

When someone writes a story, they draw from their experiences and knowledge which also consumes energy. We are constantly converting energy, matter and information.