This is not only the secret of his personal success, but also the investment philosophy he has always recommended to investors. However, the reality is that very few traders can stick to their principles in cold blood. Warren Buffett is well aware of Mr. Market's capriciousness, and he describes Mr. Market as your partner who provides you with business every day. Sometimes Mr. Market is optimistic and bids high; Sometimes he is pessimistic and asks for a very low price. Warren Buffett emphasized the need to exploit this weakness of Mr. Market to look for undervalued companies. Once found, it's an opportunity to make money. Warren Buffett believes that buying ** is buying a company, not just looking at the rise and fall of the stock price. He pointed out that ** is the fractional ownership of the company, and the value of the company is far more important than the fluctuation of the stock price. He cites the example of land transactions, which are much less volatile in comparison. Warren Buffett emphasized that it is not IQ that plays a decisive role in investing, but adherence to principles. He is not advising investors to blindly buy all undervalued companies, but to find a few undervalued quality companies, stick to their principles, and make fewer mistakes. 
Warren Buffett believes that Graham's investment philosophy is still instructive, and his students are all over the investment community. And for future Berkshire Hathaway CEO Greg Abel, fortunately he doesn't have to be another Buffett. Abel is currently responsible for all of Berkshire's non-insurance businesses, covering a number of sectors. Warren Buffett has a high opinion of Abel, believing that he will be more successful than himself. However, Abel may not be able to replicate Buffett's success because Buffett's principles and wisdom are unique. 
Warren Buffett