Marcus Buckingham is obsessed with challenging common wisdom about human potential. He's a self-described psychometrician, on a quest to find the real data behind how and why we act. He spent so much time studying high-performers at Gallup that he co-created his own Strengths Finder tool, and now coaches executives around the world.

But there are some things about human achievement that simply can't be measured. His latest book is called "Love + Work" and it's about that special magic that unlocks when you're passionate about anything. It's about much more than finding the "dream job." It's about asking deeper questions: What do you actually love to do? And when was the last time you were really there?