...that failure is never final.
Winners don't quit and quitters don't win. It's as simple as that. No successful person on earth that didn't have a taste of failure. People succeed because they persevere. Nothing profitable is ever free or easy to achieve. If anyone offers such for free, ask them for the terms and condition. It's often a trap when that happens.
Prediction can sometimes favor you or fail you, because trading is also a game of luck...
Kindly scratch that and erase such a conception in your head. Trading is a profession, not a game.