"Light is the language of cinematography; without it, there is no story."
You have to be willing to fail, to be wrong, to start over again with lessons learned.
The key to successful investing is to have a strong understanding of the fundamentals, a disciplined approach, a clear understanding of the market, a long-term perspective, a clear understanding of the risks and rewards, and a strong understanding of the market psychology.
The fact that people are full of greed, fear, or folly is predictable. The sequence is not predictable.