Warren Buffett says

“The only time to buy these is on a day with no 'y' in it.”

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“what’s good for customers is good for shareholders.”

“We trade real estate for technology (which gets cheaper and more capable every year).”

“We will make bold rather than timid investment decisions where we see a sufficient probability of gaining market leadership advantages.”

“Why focus on cash flows? Because a share of stock is a share of a company’s future cash flows, and, as a result, cash flows more than any other single variable seem to do the best job of explaining a company’s stock price over the long term.”

“Any business plan won’t survive its first encounter with reality. The reality will always be different. It will never be the plan.”