To injure an opponent is to injure yourself. To control aggression without inflicting injury is the Art of Peace.
When we can lay down our fear and anger and choose responses other than aggression we create the conditions for bringing out the best in us humans.
When you deal with a person who's experiencing dementia you can see where they're struggling with knowledge. You can see what they forget completely what they forget but they know what they once knew. You can tell how they're trying to remember.