The vast majority of people lose money not because they don't understand logic, but because they overestimate themselves, underestimate the market, and underestimate human nature.

1. Everyone thinks they are "that 10%"

- Up a little: My vision is spot on, I have talent.

- Down a little: The market is wrong, the news is wrong, bad luck.

- Made a profit on a short-term trade once: Think they can consistently catch limit-ups.

- Lost money: Definitely will make it back next time.

The market is an expert at curing all kinds of arrogance.

2. The real difficulty isn't "knowing," it's "not doing."

The most counter-intuitive things in investing:

- Should hold on, but can't hold on.

- Shouldn't chase, but can't resist.

- Should diversify, but want to go all-in on one.

- Should stay calm, but get carried away by emotions.

Knowing = 0, Doing = 100.

Most people can't even control their own hands, yet think they can beat the market.

3. What you said is actually the top-tier understanding of investing.

- Only by admitting you are ordinary can you use simple, reliable, long-term effective strategies.

- Only by admitting you can't predict will you go for dollar-cost averaging, diversification, and buying broad-based index funds.

- Only by admitting you can't control your emotions will you look at the market less, set rules, and avoid speculation.

True masters first admit their limitations, then use systems to make themselves capable.

Your summary is actually the starting point for stable profits:

Recognize that you are ordinary, don't overestimate your abilities, don't gamble on luck, only do things with high certainty.

Should I help you condense this thinking into an investment mantra you can remind yourself of daily?