If you're constantly trying to build the right thing, you have to be constantly willing to reject failed or obsolete ideas to keep moving forward.

I work at facebook (not speaking offically, mind) and can vouch for the fact that this was originally not intended for public consumption. It was written and circulated on an internal mailing list months ago. We only put it up on the engineering blog after it "leaked" in a WSJ article yesterday, and we realized the "leak" really did more good than harm.

I can see how this email can make it sound like there's a "personality cult" surrounding Mark Zuckerberg. It's not really that strange. Inside facbeook, he's a force of nature, like all other founder-CEOs: "working with Zuck" is properly a special topic, and facebook employees pay special attention to it, as I assume Apple employees do to "working with Steve", google employees do to "working with Larry and Sergey", and I did to "working with Diane" while at VMware.

There are obviously limits about what an employee can say about his boss, but I'd trust Boz's assessment more than just about anybody else's at Facebook. He didn't glorify Mark as some perfect boss but tried to communicate honestly about the nuances of his management style.