The most foolish thing people do is to ignore what they know. 'There are no secrets' – who doesn't know this old saying?! It's about a lack of control.
Basically, most mistakes people make are deliberate. Why? Simply, it's greed – whether it's money or affairs.
Look at all the corrupt officials; they were meticulous, but ultimately, they brought themselves to prison.
Those who rashly do wrong things always regret it. What's the use then?
Take extramarital affairs, for example, people think they've found true love and then fabricate lies to cover it up, inevitably leading to mutual ruin.
Nobody can think they're the only one who knows. While you're doing it, someone else is watching.
As the saying goes, 'People do what they do, and Heaven watches.' Who is Heaven? It's the witness, the collective consciousness, and the laws of the nation. With so many people around, no one is naive; eventually, things will come to light.
Therefore, it's good to have experience and rules after forty years.