you need short-term paranoia to keep you alive long enough to exploit long-term optimism. - Morgan Housel

The biggest single point of failure with money is a sole reliance on a paycheck to fund short-term spending needs, with no savings to create a gap between what you think your expenses are and what they might be in the future.

Nassim Taleb writes in his book Fooled By Randomness: In Pharaonic Egypt … scribes tracked the high-water mark of the Nile and used it as an estimate for a future worst-case scenario. The same can be seen in the Fukushima nuclear reactor, which experienced a catastrophic failure in 2011 when a tsunami struck. It had been built to withstand the worst past historical earthquake, with the builders not imagining much worse — and not thinking that the worst past event had to be a surprise, as it had no precedent. This is not a failure of analysis. It’s a failure of imagination. Realizing the future might not look anything like the past is a special kind of skill that is not generally looked highly upon by the financial forecasting community. At a 2017 dinner I attended in New York, Daniel Kahneman was asked how investors should respond when our forecasts are wrong. He said: Whenever we are surprised by something, even if we admit that we made a mistake, we say, ‘Oh I’ll never make that mistake again.’ But, in fact, what you should learn when you make a mistake because you did not anticipate something is that the world is difficult to anticipate. That’s the correct lesson to learn from surprises: that the world is surprising.

progress happens too slowly to notice, but setbacks happen too quickly to ignore.