That happens to be false.
Failure or loss becomes reality only when one quits. And one quits only when attention is allowed to wander away from and abandon the sight of the mountaintop (the intended goal). Attention doesn’t wander when one knows what to do.
When hiking toward the top of a mountain, one simply takes each step one at a time, handling what comes. Enough steps taken, and the goal is reached. The more one knows what to do and how to do it, the easier the goal is reached. Conversely, the less one knows, the harder the steps are to take, the harder the goal is to reach.