When you invest in equity, risk is inherent. Mr. Buffett, however, reinforces that you, as an investor must be aware of what you are doing. This is possible only with a sound knowledge. Buying businesses that you do not know of may lead you to be directionless. Rather, learn about the companies and their managements. Research is the basis of knowledge about companies you want to invest in. Understand how their business functions over the period of time and how does the company adapt to the situations. Buying stocks without knowing why you want to buy those stocks is a risk.