Price fluctuations have only one significant meaning for the true investor. They provide him with an opportunity to buy wisely when prices fall sharply and to sell wisely when they advance a great deal.
Benjamin GrahamNothing important on Wall Street can be counted on to occur exactly in the same way as it happened before.
Benjamin GrahamBefore you invest, you must ensure that you have realistically assessed your probability of being right and how you will react to the consequences of being wrong.
Benjamin Graham