“You give me a billion dollars and tell me to go in the chewing gum business and try and make a real dent in Wrigley's. I can't do it.”

Warren Buffett explains his philosophy on choosing businesses with enduring value, emphasizing simplicity, strong economics, and able management. He illustrates this by stating he wouldn't invest in a business if he couldn't foresee its success ten years out, and views buying stocks as buying a piece of a business, not just a fluctuating price.