At what moment did cole know he was ready to do the anger dance?

Cole realizes that to be invisible he has to clear his mind. He had to become invisible “not to the world, but to himself.” He heads to the shore to clear his mind, and when he does so, the Spirit Bear appears by the shore. The sight of the bear is only fleeting, and it disappears almost as quickly as it had appeared.

That night, Cole feels ready to do the dance of anger that Edwin had been telling him about. It naturally comes to him as he lets out a scream and dances around the fire. He again relived the bear attack, and he cries asking forgiveness for attaching Peter. He then forgives those who have hurt him, and he cries profusely. As the scene closes with Cole collapsing, exhausted, crying, halfway through the night, the Spirit Bear looks on, unbeknownst to Cole.