The speculator's chief enemies are always boring from
within. It is inseparable from human nature to hope and to fear.
In speculation when the market goes against you -- you hope that
every day will be the last day and you lose more than you should
had you not listened to hope -- to the same ally that is so
potent a success-bringer to empire builders and pioneers, big
and little. And when the market goes your way you become fearful
that the next day will take away your profit, and you get out
too soon. Fear keeps you from making as much money as you ought
to. The successful trader has to fight these two deep-seated
instincts. He has to reverse what you might call his natural
impulses. Instead of hoping he must fear; instead of fearing he
must hope. He must fear that his loss may develop into a much
bigger loss, and hope that his profit may become a big profit.
It is absolutely wrong to gamble in stocks the way the average