Prediction and reflection are two sides of the same coin.

They are both about making a model of the world.

Prediction is about modeling into the future.

Reflection is about abducting a model from the past.

A model gives you leverage; it helps you take actions that are far more likely to succeed.

When you are dealt in, you have a model of it.

You aren't just spectating or going with the flow, you are in the loop, inside of it, absorbed by it, ready to make a decision in it.

This is the difference of being in the arena vs a spectator.