If you want great mentors, you have to become a great mentee. If you want to lead, you have to first learn to follow. - Tim Ferriss

In all, Kepler tested seventy circular orbits against 's Mars data, all to no avail. At one point, performing a leap of the imagination like Leonardo's to the moon, he imagined himself on Mars, and sought to reconstruct the path the earth's motion would trace out across the skies of a Martian observatory; this effort consumed nine hundred pages of calculations, but still failed to solve the major problem.

On Diversification for Stress Management The below came from me asking, “What advice would you give your 30-year-old self?”: “My 30-year-old self wouldn’t have access to medical marijuana, so I’d have a limited canvas with which to paint. I’ve always made it a top priority since I was a teenager — and had tons of stress-related medical problems — to make that job one: to learn how to not have stress. I would consider myself a world champion at avoiding stress at this point in dozens of different ways. A lot of it is just how you look at the world, but most of it is really the process of diversification. I’m not going to worry about losing one friend if I have a hundred, but if I have two friends I’m really going to be worried. I’m not going to worry about losing my job because my one boss is going to fire me, because I have thousands of bosses at newspapers everywhere. One of the ways to not worry about stress is to eliminate it. I don’t worry about my stock picks because I have a diversified portfolio. Diversification works in almost every area of your life to reduce your stress.

This book argues that ... the was sparked—caused is perhaps not too strong a word—by the scientific revolution, and that science continues to foster today. It's not just that scientific creativity has produced technological improvements, which in turn have enhanced the prosperity and security of the scientific nations, although that is part of the story, but that the freedoms protected by liberal democracies are essential to facilitating scientific inquiry, and that democracy itself is an experimental system without which neither science nor liberty can flourish.