If you are a professional and have confidence, then I would advocate lots of concentration.
Warren BuffettIf you lose money for the firm, I will be forgiving. If you lose reputation, I will be ruthless.
Warren BuffettI mean, you know, you're not going to change the human animal. And the human animal really doesn't get a lot smarter.
Warren BuffettOur investments continue to be few in number and simple in concept: The truly big investment idea can usually be explained in a short paragraph. We like a business with enduring competitive advantages that is run by able and owner-oriented people. When these attributes exist, and when we can make purchases at sensible prices, it is hard to go wrong (a challenge we periodically manage to overcome).
Warren BuffettAs I have mentioned before, we cannot make the same sort of money out of permanent ownership of controlled businesses that can be made from buying and reselling such businesses, or from skilled investment in marketable securities. Nevertheless, they offer a pleasant long term form of activity (when conducted in conjunction with high grade, able people) at satisfactory rates of return.
Warren Buffett