The belief required to start a company that solves a massive, complex problem like communication isn't confidence, but a form of delusion. This mindset allows founders to persist through challenges that a more realistic person might abandon, especially when a problem seems fundamentally unsolvable.

Investor Mark Rampolla argues that a brand's potential is capped by its leader's personal development. His firm seeks self-aware founders committed to "inner work," believing this psychological resilience is a key predictor of building a billion-dollar company.

When meeting Cursor's founder, the investor felt an "electric energy" even as the founder was pivoting away from his original idea. This highlights that for elite early-stage investors, the founder's intrinsic drive and potential are the constant to bet on, as ideas will inevitably change.

While assessed during diligence, the true caliber of a founder—their passion, authenticity, and ability to "run through walls"—becomes starkly clear after the deal closes. This distinction is not subtle; the impact of a truly exceptional founder versus an average one is immediately evident in the business's trajectory.

Rather than imposing processes after investing, VCs can use frameworks like the "sales sprint" as a pre-investment litmus test. Sharing the approach and observing the founder's reaction reveals their mindset. A founder who is eager to adopt a disciplined, customer-centric process is a stronger bet than one who must be forced into it.

Before convincing investors or employees, founders need irrational self-belief. The first and most important person you must sell on your vision is yourself. Your conviction is the foundation for everything that follows.

To identify non-consensus ideas, analyze the founder's motivation. A founder with a deep, personal reason for starting their company is more likely on a unique path. Conversely, founders who "whiteboarded" their way to an idea are often chasing mimetic, competitive trends.

A rising tide lifts all boats. The true test of a founder partnership emerges during downturns. Diligence should focus on teasing out traits like adaptability, humility, and accountability, which predict how a founder will react when plans inevitably go awry.

The most driven entrepreneurs are often fueled by foundational traumas. Understanding a founder's past struggles—losing family wealth or social slights—provides deep insight into their intensity, work ethic, and resilience. It's a powerful, empathetic tool for diligence beyond the balance sheet.