I’d like to close this chapter with an essential caveat about persistence from Built to Last. Of all the paragraphs I’ve authored or co-authored in thirty years, this is one of the most essential for entrepreneurs and leaders of early-stage ventures, reproduced here as a reminder to keep firmly in mind as you build your company:

The builders of visionary companies were highly persistent, living to the motto: Never, never, never give up. But what to persist with? The company. Be prepared to kill, revise, or evolve an idea . . . but never give up on the company. If you equate the success of your company with the success of a specific idea—as many businesspeople do—then you’re more likely to give up on the company if that idea fails; and if that idea happens to succeed, you’re more likely to have an emotional love affair with that idea and stick with it too long, when the company should be moving vigorously on to other things. But if you see the ultimate creation as the company, not the execution of a specific idea . . . then you can persist beyond any specific idea—good or bad— and move toward becoming an enduring great institution.

Your company is an organism; its cells need to divide to multiply, they need to differentiate to become something new. Don’t worry about what you’re going to lose—think about what you’re going to become.

As for what you shouldn’t delegate, consider the unique value you’re able to add when it comes to the organization’s top priorities. Some of that flows from your personal strengths. For example, I’m a good writer, so over the years I’ve used that skill to help our team document and share its values—from authoring career guidelines and interview playbooks to putting out internal notes on lessons we’ve learned in building products. One of my colleagues is an amazing operator, so he’s responsible for running our design team’s most complex processes, such as recruiting. My manager Chris is one of the most inspiring speakers I know, so he’s the first person to greet new employees at orientation and tell them about Facebook’s mission and values.

When you value something deeply, don’t shy away from talking about it. Instead, embrace telling people why it’s important to you. Assume that for the message to stick, it should be heard ten different times and said in ten different ways. The more you can enlist others to help spread your message, the more likely it is to have an impact.

If you say something is important to you and you’d like the rest of your team to care about it, be the first person to live that value. Otherwise, don’t be surprised when nobody else does either.