Nassim Nicholas Taleb

One cannot judge a performance in any given field (war, politics, medicine, investments) by the results, but by the costs of the alternative (i.e., if history played out in a different way).

When you develop your opinions on the basis of weak evidence, you will have difficulty interpreting subsequent information that contradicts these opinions, even if this new information is obviously more accurate.

Someone with an asymmetric mind makes himself rich by giving society what it doesn't know how to get, instead of what it thinks it wants.

To learn that you have wasted years of your life, that you were misguided, that you were wrong - these are not pleasant revelations. But they are useful ones.

Antifragility is beyond resilience or robustness. The resilient resists shocks and stays the same; the antifragile gets better.