Alright, a bit of background first. The boy and the mole meet up with a fox caught in a snare. The fox threatens them, and the mole points out that the fox will die if he stays in the snare, so the mole frees him despite the previous threat.
After this, the mole says “one of our greatest freedoms is how we react to things.”
~ Charlie Mackesy
(The next image is of the boy and the mole in a tree, looking down at the fox who made footprints in the shape of a heart in the snow)