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Never give anyone the advice to buy or sell shares, because the most benevolent price of advice can turn out badly.

I don't take investment advice from wealth managers. I have grown several businesses from scratch and amassed many millions from my publishing empire - why would I take advice from someone who has never experienced that?

There are domains in which expertise is not possible. Stock picking is a good example. And in long-term political strategic forecasting, it's been shown that experts are just not better than a dice-throwing monkey.

An expert is someone who tells you why you can't do something.

One of the funny things about the stock market is that every time one person buys, another sells, and both think they are astute.

Investors should invest on what they know. The biggest mistake is to invest on what they don't know.

The best advice comes from people who don't give advice.

I don't really consider myself to be a personal finance expert compared with some others. There are quite a few that know a lot more than I do.

An expert is someone who knows some of the worst mistakes, which can be made, in a very narrow field.

The ability to select stocks, manage them over time and know when to sell them is incredibly difficult, even for professional fund managers.