Goodness is not goodness that seeks advantage. Good is good in the final hour, in the deepest pit without hope, without witness, without reward. Virtue is only virtue in extremis. This is what he believes, and this is the reason, above all, I love him.
I know there’s been #discourse over the show using a ‘let’s kill hitler’ still for the picture of River on the Doctor’s desk but personally I think it’s completely hilarious because it just brings to mind a scene of 12 crossing his own timeline, watching his wife literally trying to murder him, and essentially going: