how to actually become a polymath.

Many people mistakenly believe that being a polymath means having superficial knowledge across many fields. However, a true polymath possesses deep expertise in multiple areas. This distinction is crucial because real expertise involves building patterns and intuition that cannot be taught with words.

Achieving mastery in one field teaches you what true expertise feels like, how to develop intuition, spot patterns, and most importantly, how to learn effectively. This foundational learning ability is transferable and significantly accelerates the learning process in subsequent fields. The example of Johnny Kim, who mastered being a Navy Seal before becoming a doctor and then an astronaut, illustrates this point perfectly.

Your brain doesn't automatically connect knowledge from different fields; you need to force it. A 3M study on innovation identified 'polymaths' as inventors who had depth in one core area but also worked across many different technology classes. These polymaths excelled by constantly comparing patterns across fields, enabling them to apply solutions from one domain to another. To practice this, purposefully find examples from completely different areas that utilize the same underlying idea.

Counterintuitively, attempting to solve problems and failing before being taught (productive failure) significantly enhances learning. Studies show that students who struggle first perform much better. This struggle makes your brain aware of knowledge gaps, priming it to actively seek and absorb information when it's eventually presented, leading to stronger memory retention.

Desirable difficulties are learning strategies that make practice harder but improve long-term retention and transfer of knowledge. These include interleaving (mixing different skills in practice), spacing (spreading learning over time), and 'testing yourself before learning' (trying to answer questions or solve problems before seeing the solutions).

To become a polymath, first, go deep in one field to build genuine expertise and intuition. Second, actively use comparison by finding common patterns and ideas across completely different domains. Third, embrace struggling by testing yourself and wrestling with problems before learning the answers. These strategies foster curiosity and create strong neural connections that aid in knowledge transfer.