I was reading the book Writing that Works by Kenneth Roman and Joel Raphaelson, and in the speeches and presentations chapter of this book, the authors used Robert E. Rubin's speech on uncertainty as an example of great writing. I quickly downloaded the speech and gave it a read.
Not only is it a fabulous speech because of the way it is structured, but the advice and knowledge that Robert gives is very informative. Robert E. Rubin has a belief that no matter how certain one person may think he or she is, in the end, the only thing with a 100% probability is that nothing is certain. In other words, the only certainty is that nothing is certain.
After reading this speech, I went on to read Robert's book In An Uncertain World where he talks about how he developed his principles on dealing with an uncertain world, and the economic crises that he experienced at Goldman Sachs in the risk arbitrage department and his time as Secretary of the Treasury under Bill Clinton. It was at Goldman Sachs and at his position as Secretary of the Treasury where he developed his principles on how to make decisions in an uncertain world.