We all admire the wisdom of people who come to us for advice.

When I was at drama school, I wanted to change the world, and thought I had some great wisdom to impart to people about humanity. Now that I'm older, I know enough to realise that I know nothing at all.

The plan was criticized by some retired military officers embedded in TV studios. But with every advance by our coalition forces, the wisdom of that plan becomes more apparent.

Many people have their reputations as reporters and analysts because they are on television, batting around conventional wisdom. A lot of these people have never reported a story.

Even when you have doubts, take that step. Take chances. Mistakes are never a failure - they can be turned into wisdom.