Process: What is Sacred Writing?

This week I was interviewed as an expert on the topic of Sacred Writing: From Inner Critic to Spiritual Muse. Big thanks to Shamia Casiano for the invitation.
Her first question was "What is Sacred Writing?"
It's an idea I have been playing with for some time, but only recently have I been able to put it into words. I'm not talking about hieroglyphics or runes or any of those scripts.
What I'm talking about is something I've been looking for a long time. Since middle school I have been fasc...