The Doctor, begins to destress as the area around them turns something that isn't white. There's a slow thank you with his eyes. Then a deep inhale and slow exhaling and seems to be more level.

However, the sound of the voices and the imagery shown before them, explain what The Doctor saw in John's eyes before. And there's a look of concern on his face because he sees the pain and angst in the one John with the knife.

The Doctor remarks with a firm tone, "Don't... It's not worth it. War just makes monsters out of -," The Doctor turns to the actual John, "Oh good. Good for you! Oh yes!" The Doctor beams.