It can be very expensive to try to convince the markets you are right.
Longevity is the key to success.
Losing a position is aggravating, whereas losing your nerve is devastating.
A lot of people would rather understand the market than make money
A losing trader can do little to transform himself into a winning trader. A losing trader is not going to want to transform himself. That's the kind of thing winning traders do.
The biggest secret about success is that there isn't any big secret about it, or if there is, then it's a secret from me, too. The idea of searching for some secret for trading success misses the point.