It turns out Bitcoin can't do introspection - and that's essential if you want to make a bridge. Let me explain. Before you can understand the world around you, you must first understand yourself. This philosophical axiom turns out to be a fundamental technical challenge in Bitcoin's evolution. As we work on BitVM 2, we've discovered that Bitcoin's inability to perform introspection - to understand its own state - is a critical bottleneck in enabling trustless bridging with other blockchains. Consider a simple human analogy: before you can meaningfully interact with others, you need self-awareness. Bitcoin faces the same challenge. While other blockchains can easily determine their current state, Bitcoin cannot even tell you what block height it's currently operating at. This limitation isn't immediately obvious - it emerges only after layers of technical investigation. What makes this particularly fascinating is that Bitcoin's consensus mechanism is inherently relative, not absolute. Unlike proof-of-stake systems where a block's validity can be determined by examining the block itself, Bitcoin requires comparison against other potential chains. You can't know if you're on the right path without seeing all possible paths. We haven’t yet figured out the most secure path forward with BitVM 2, though we are working hard on it. I think about solutions day and night. But through it all, one platitude remains certain: Know thyself, before you can know others.