Warren Buffett: "Your goal as an investor should be simply to purchase, at a rational price, a part interest in an easily understood business whose earnings are virtually certain to be materially higher 5, 10, & 20 years from now. Over time, you will find only a few companies that meet those standards—so when you see one that qualifies, you should buy a meaningful amount." This insight remains as powerful as ever almost 3 decades after he wrote it in 1996.