The first idea was, to remember that your thoughts can and at times will be wrong and this is a pure given. Finally I made a mistake and this set off a chain reaction to throw every stock I had overboard and now I am sitting net short?
Or, maybe the answer is this:
"Each of us is possessed with the common weakness of wanting to have an interest in every jackpot, and we certainly would like to play every hand at bridge. It is this human frailty which we all possess in some degree that becomes the investor’s and speculator’s greatest enemy and will eventually, if not safeguarded, bring about his downfall."