Four decades produce a great deal of experience and a very short list of things you would actually put in writing.

Most of what I learned early turned out to be technique — useful, replaceable, and quietly obsolete within a decade. The things that survived were duller and harder: that patience is a strategy rather than a temperament, that the person raising the awkward objection is usually the one worth keeping, and that almost every serious mistake I made was a speed problem rather than a judgement problem.

I have also learned that experience is not automatically wisdom. It is only wisdom if you were willing to be wrong in public at some point along the way, and to remember it accurately afterwards rather than editing it into a better story.

Patience is a strategy, not a temperament.

The ventures that did not work taught more than the ones that did — and cost enough that I would rather the lesson were not wasted.

There is a version of this page where failure appears as a brief, tasteful mention before returning to the successes. That version is useless to anyone reading it. The truth is that some things I built were wrong in conception, not in execution: the market did not exist, or existed for someone else, and no amount of effort was going to change that.

What I take from those years is the discipline of separating a bad idea from a bad season. A bad season needs endurance. A bad idea needs an ending, delivered early and without ceremony. Confusing the two is the most expensive mistake available to an entrepreneur, and I have made it more than once.

A bad season needs endurance. A bad idea needs an ending.

A handful of days changed the direction of everything that followed. None of them felt significant at the time.

Leaving a secure position. Choosing golf when it was not yet an industry. The decision, somewhere around 2013, to stop expanding and start dismantling. A conversation with a colleague who told me something I did not want to hear and was right.

What they share is that each one was a choice to accept a worse short term for a better long one. That is the whole pattern, and I did not see it until much later.

Every turning point was a choice to accept a worse short term.

Leadership is mostly the management of other people's uncertainty, and only occasionally the making of decisions.

The romantic account has the leader deciding. In practice, the decisions are a small fraction of the work. The larger part is holding a room steady enough that good decisions become possible — being the person who does not panic on the bad Monday, who says the hard thing plainly rather than by implication, and who is consistent enough that people can predict you.

Predictability is undervalued. A team that can anticipate how you will react spends its energy on the work rather than on managing you.

A team that can predict you spends its energy on the work.

The next generation will build faster than mine did, with better tools and less margin for the slow accumulation of judgement.

Capital is more available, distribution is nearly free, and a competent founder can now reach a market in months rather than years. What has not changed is that a company still has to be worth existing after the launch, and that part is not faster than it used to be.

My worry is not that young entrepreneurs lack ambition — they have more than we did. It is that the environment rewards visible motion so heavily that the quiet years, where the actual competence is built, look like failure while they are happening.

The quiet years look like failure while they are happening.

Sustainability became a department in most organisations. It should have become a constraint on every other one.

Treated as a function, it produces reports. Treated as a constraint, it changes what gets proposed in the first place — which projects are viable, which margins are real, and which costs were being quietly passed to somebody downstream.

I do not think this is idealism. A business that has externalised its costs has not made a profit; it has taken a loan from a community that has not yet sent the invoice. Building for decades means assuming that invoice eventually arrives.

A business that externalises its costs has taken a loan, not made a profit.