When I woke up today I didn’t feel older, but I know I am. 

When I weighed myself I lost a couple pounds since yesterday.

Nothing stays the same. 

Some things improve (my weight). Some things degrade (my age).

Your flow performance is the same.

Many people assume flow performance is the same as it was 6 months ago. It is not.

You are either improving or degrading.

This is the second law of thermodynamics and it holds for flow.