"I found leaving Manchester United very, very hard."

"I always planned to retire when I was at the top and at Manchester United I have reached the pinnacle of my career."

"Sometimes you get submerged by emotion. I think it's very important to express it - which doesn't necessarily mean hitting someone."

"Some people need to stay at the top. They are afraid to re-start from zero because they fear the critics."

"Power must be used, but it must be tempered by soul-searching and the recognition of our human capacity for error. That is the maxim that should inform our approach to every challenge, from reforming state government to engaging in foreign affairs."

"The general tendency of things throughout the world is to render mediocrity the ascendant power among mankind."

"In individuals, insanity is rare; but in groups, parties, nations and epochs, it is the rule."

"The world itself is the will to power - and nothing else! And you yourself are the will to power - and nothing else!"