Sep 13, 2013 · 1 minute

Evernote CEO Phil Libin is no fan of the cult of going public, famously calling IPOs a "moral obligation." But when it comes to Twitter, he thinks few companies are better suited to the challenge.

One reason is the product itself. He thinks companies like Twitter, that in his words have made "the world better off," should be the ones that come to define this modern era of technology. But beyond that, he's confident in Twitter's IPO because of its fearless leader: Dick Costolo.

"I'm sure that if Dick thinks it's the right time to go public then he's probably got all his ducks in a row and he's probably figured out how to do it and it's a good thing."

To Libin, Costolo is more than an inspiration. He's a mentor, generously giving his time to helping Libin navigate the kind of "good problems" that come along with heading up a growing company.

One of Libin's biggest challenges at Evernote was figuring out how to scale while preserving the startup culture that drove the company's growth in the first place.

"I talked to him about, 'Well, how do I preserve the startup culture at Evernote?' And I think he said, 'You don't. You can't preserve the culture. If you try to preserve it then you're sort of locking into place, you start to stagnate.'"

Libin adds, "It isn't your job to preserve the culture, it's your job to evolve the culture intentionally in the direction that you want."

Watch the full clip below:

[Photo by Yelena Sophia for PandoDaily]