The most realistic distinction between the investor and the speculator is found in their attitude toward stock-market movements. The speculator's primary interest lies in anticipating and profiting from market fluctuations. The investor's primary interest lies in acquiring and holding suitable securities at suitable prices. Market movements are important to him in a practical sense, because they alternately create low price levels at which he would be wise to buy and high price levels at which he certainly should refrain from buying and probably would be wise to sell.
Benjamin GrahamNo matter how careful you are, the one risk no investor can ever eliminate is the risk of being wrong. Only by insisting on what Graham called the "margin of safety" - never overpaying, no matter how exciting an investment seems to be - can you minimize your odds of error.
Benjamin GrahamTo establish the right price for a stock, the market must have adequate information, but it by no means follows that is the market has this information it will thereupon establish the right price.
Benjamin GrahamIf you are shopping for common stocks, choose them the way you would buy groceries, not the way you would buy perfume.
Benjamin Graham