We know that the market is dynamic,as in it changes constantly,and as such,an investor who isn't careful enough to know when he is investing will fall in to heart problems or emotional trauma as a result of a massive fall in value,that is why it is important to condition your mind in a way that you won't get heart failure when you are at the loosing end.
Every investor knows there is risk in the game,and taking the risk is what shows you are ready to eradicate poverty from your life.
I think this is something that must be experienced. It is painful to think in this process and gain experience. Life is an experience. Our purpose is not to make money, but to gain experience and value in experience. Earning wealth is to go with the flow natural process.