The best careers are built on curiosity. Bill Gurley — the legendary Benchmark Capital investor behind Uber, Zillow, and Snapchat — makes that case in his new book, Runnin' Down a Dream.

I sat down with him on the same day we published LinkedIn's annual Skills on the Rise list, and his message felt like a perfect companion to it: the skill that makes all the others possible is being a continuous learner. And for that, Bill says, you need to have fascination.