"[T]he function of the margin-of-safety is, in essence, that of rendering unnecessary an accurate estimate of the future. If the margin is a large one, then it is enough to assume that future earnings will not fall far below those of the past in order for an investor to feel sufficiently protected against the vicissitudes of time."
"Needless to say, the analyst must take possible future changes into account, but his primary aim is not so much to profit from them as to guard against them. Broadly speaking, he views the future as a hazard which his conclusions must encounter rather than as the source of his vindication."
"[F]inding the really outstanding companies and staying with them through all fluctuations of a gyrating market proved far more profitable to far more people than did the more colorful practice of trying to buy them cheap and sell them dear…These opportunities did not require purchasing on a particular day at the bottom of a great panic."