“We are what we repeatedly do. Excellence, then, is not an act, but a habit.” - Aristotle Aristotle was one of the greatest thinkers to ever live. 384 BC, he was the son of the royal physician to the king and was raised around dissections and court medicine. He left for Athens at 17 and walked into Plato's Academy, where he would stay for the next two decades. He was the school's most gifted student, and grew to be one of its most public dissenters. His instructor, Plato, taught through interrogation: ask a question, expose the contradiction hiding inside the answer, then ask again. We now call this the “Socratic Method.” It teaches students to LEARN, not just memorize, and it’s still the backbone of law schools, med schools, and universities everywhere on earth today. It's the difference between a philosopher and a scientist, and Aristotle is arguably the first person to fully make that turn. His training with looking closely produced an incredible list of "firsts”: He dissected chick embryos day by day to document how a heart forms before anything else does. He classified over 500 animal species, correctly grouping whales and dolphins as different from fish 2,000 years before anyone else. He invented formal logic outright; the syllogism, the basic machinery of valid argument, which was taught unchanged in universities for the next two millennia. In his spare time, he concluded the northern landmasses had to be balanced by an undiscovered continent in the south that he named Antarktikos. Nobody would lay eyes on Antarctica for another 2,000 years. But perhaps his most famous achievement wasn't a discovery, but a pupil: for 8 years, Aristotle taught a boy medicine, ethics, politics, and Homer, reportedly annotating a personal copy of the Iliad for him to carry into battle. He warned him specifically against treating conquered peoples as lesser. The boy ignored that part. He went on to conquer Persia, Egypt, and most of the known world by the age of 25, and died undefeated at 32. History remembers him as Alexander the Great.