We dedicate years to learning skills like math but expect people to navigate the complexities of marriage with no training. Society frames marriage as a magical state you're either good at or not, rather than a practical skill set that can be taught, practiced, and improved, leading to predictable failure.

Young couples often master romantic connection but fail to discuss the practical, mundane reality of a long-term partnership. Success requires a shared vision for the daily grind of bills, expenses, and lifestyle trade-offs that make up the vast majority of a life together.

Catastrophic relationship failures are rarely caused by a single event. Instead, they are the result of hundreds of small moments where a minor conflict could have been repaired with validation or an apology, but wasn't. The accumulation of these unrepaired moments erodes the relationship's foundation over time.

People cite specific events like affairs or fights as the reason for divorce. However, the root cause is a gradual loss of the shared story and purpose that once united them. The triggering event is merely the final chapter, not the whole story of the decline.

Couples make two fatal, opposing assumptions. First, that marriage will fix a partner's existing flaws. Second, that the person they marry will not fundamentally change over decades. A successful marriage requires accepting current flaws while preparing to grow alongside an evolving partner.

People mistakenly believe marriage will either change their partner for the better (fixing flaws) or prevent their partner from ever changing (preserving the current dynamic). Both assumptions are flawed and set the relationship up for failure.

Contrary to popular belief, a degree of pessimism is a useful tool for building resilient relationships. Expecting a partner to be imperfect, frustrating, and disappointing at times creates a stronger foundation than entering a relationship with idealized, fragile expectations.

Strong initial chemistry is often mistaken for genuine compatibility, leading people to commit prematurely. The subsequent attempt to change a partner to fit a preconceived vision inevitably breeds resentment and conflict when values are discovered to be misaligned.

A relationship's strength isn't determined by peak moments but by its ability to repair ruptures. How a couple handles disagreement is a far better predictor of long-term success than how much they enjoy the good times together, a concept called the "divorce paradox."