And we know that because he extensively documented his life and what he thought at any one time in his diaries.
Anyone who does that in political life would be open to deserved criticism now and then.
But modern politicians don't.
Spot on. He was extraordinarily open and transparent about his life, his thoughts and actions, including points where he changed direction or changed his mind. One effect of this, unlike most politicians, is that it made it very difficult for any journalists to do a hatchet job on him by digging up hidden aspects of his life, because most of the things they could come up with were things that he'd already made public himself.
Remarkable bloke, and it's great to see such admiration and affection for him on here, with remarkably (for NSC) few bitter or denigrating comments. Says something about the man.