A decade ago I made a goal to read more history and fewer forecasts. It was one of the most enlightening changes of my life. And the irony is that th… - Morgan Housel

Physicist Freeman Dyson once explained that what’s often attributed to the supernatural, or magic, or miracles, is actually just basic math. In any normal person’s life, miracles should occur at the rate of roughly one per month: The proof of the law is simple. During the time that we are awake and actively engaged in living our lives, roughly for eight hours each day, we see and hear things happening at a rate of one per second. So the total number of events that happen to us is about 30,000 per day, or about a million per month. If the chance of a “miracle” is one in a million, we should therefore experience one per month, on average.

The challenge for us is that no amount of studying or open-mindedness can genuinely recreate the power of fear and uncertainty. I can read about what it was like to lose everything during the Great Depression. But I don’t have the emotional scars of those who actually experienced it. And the person who lived through it can’t fathom why someone like me could come across as complacent about things like owning stocks. We see the world through a different lens.

A mindset that can be paranoid and optimistic at the same time is hard to maintain, because seeing things as black or white takes less effort than accepting nuance. But you need short-term paranoia to keep you alive long enough to exploit long-term optimism. Jesse Livermore figured this out the hard way.