Purity and Humility Unlock an Anointing

Mark Batterson has some words about spiritual anointing that we should all consider. I was especially struck with the last sentence.
I'm not sure any of us can even define the anointing. I think it's unexplainable, undefinable, and uncontrollable. But I want it. I need it. And I can't do anything without it. I'm not trying to get hyper-spiritual here. But you know when you have it and you know when you don't. On one level, it's not something you can man-u-facture. But I do think purity and humility are the keys to unlocking the anointing.