"I know that you don't know, but you don't know that you don't know! By that I mean there are three reasons why individuals and businesses fail: 1. Arrogance 2. Arrogance 3. Arrogance."

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I don't like people being rude. Bad manners and arrogance make me cross. People making others feel uncomfortable. And I really don't like it in restaurants when people are rude or patronising to waiters. I feel like saying, 'They're not your slave'. But my knees only shake around once every five years. You're safe, don't worry.

— Alan Titchmarsh