A Guide to Building a Second Brain in Mem

Your second brain, on the other hand, is great at storing information. But it’s not just good at that. It’s a tool for thinking that complements your first brain’s ability to observe and reflect, to generate insights and make connections between ideas. It’s a personal knowledge network that also creates a self-sustaining knowledge generation cycle.

The first thing to understand is that your “first” brain is a terrible place to store information. Using it like a hard drive is the equivalent of buying a high-performance car like a Ferrari and only driving it in neighborhoods where the speed limit is 25 MPH. In other words, when you use your brain to store information, you are wasting its power. The primary functions of your first brain are to imagine, invent, innovate and create.

Information only becomes knowledge when you use it

Since ideas take time to mature, your second brain allows you to capture ideas, have spontaneous insights without taking immediate action, and build a system that helps you remember everything.

Our chronological memories are an interconnected web of experiences we’ve had. And since memory is contextual, remembering an experience or event brings up all the associative memories. As we age, we accumulate more experiences, memories, insights, knowledge and wisdom. As a result, the nonlinear associative networks in the brain expand. This is why something you thought was brilliant when you were 20 seems completely misguided when you’re 40. The flow of information shapes memory, and the more things you learn about, the more your own ideas develop.