I first heard it from Abraham Hicks. Then I heard it from Bruce Lipton a Cell Biologist. He wrote about in his book The Biology of Belief. Then I heard Donny Epstein say it. :)

I also wrote on this in You Are Not the Originator of Your Thoughts and We're Very Big.

It's been said that when someone does something really well, they're channeling really. Such as when an athlete does something really superb and out of the ordinary. They usually say, I get out of the way and step aside and get into a zone. And painters get into a zone. This is what I experiment with often when I write. I'm usually stepping aside, in receptive mode and letting it flow.

Channeling is a funny word. It's quite outdated really. But we're very big. And we can tap into anything. Most of the time people are only tapping into thoughts that are in line with their programming. So they're getting a very limited range, and nothing very new, leading edge, or inspirational. But when you start to become more subtle, and you practice tapping in, you get inspiration and cutting edge thoughts and ideas.