I discovered this quote in the book Act Like a Leader, Think Like a Leader by Herminia Ibarra. The booked had a big impact on my life and this quote has turned into my mantra. Basically, if you want to know how to do something you have to get out there and do it. It might be scary (or more like terrifying), but once you have that experience or new skill, no one can take it away from you. And that is where the power lies.
So get out there and do the thing you’ve been mulling over. You’ll be thankful that you did.