First, I agree with Massimo (which essayist Daniel Linford didn't so bluntly state) that Armstrong is fluff. But, because she makes Islam look halfway New Agey, she gets respect, or Respect. (And, she's a TED Prize winner, so! So what? The E in TED stands for Entertainment, let's not forget.)
But, she has Grounds for Respect.
Because capitalizing letters for phrases like Ground of Being is of course how you prove mystic claims.
Speaking of, the piece has brought said mystic provers out of the woodwork. Most of them (if they'd actually read and learn) could stand a good dose of Wittgenstein on private languages. They could also stand a moderate dose of Hume coupled with knowledge of the naturalistic, biochemical cause of brain states that exactly parallel "mystical experiences." Hume comes in with the good old is-ought distinction. Just because we evolved agency imputers in our mental makeup that sometimes run wild doesn't mean that they ought to run wild.
This is primarily drawn from my last comment there.
Or, again, per earlier comment and Daniel’s theme (which has indeed been addressed by non-mystics), Your Mysticism Is Too Egocentric.
For everyone who partakes only of milk is not accustomed to the word of righteousness, for he is an infant But solid food is for the mature, who because of practice have their senses trained to discern good and evil.
I gave you milk, not solid food, for you were not yet ready for it. Indeed, you are still not ready.
Oh, the depth of the riches of the wisdom and knowledge of God! How unsearchable his judgments, and his paths beyond tracing out! Who has known the mind of the Lord? Or who has been his counselor?
The ineffability of the god of the mystics is the same as the inscrutability of the god of the traditional omnipotent monotheists. With both groups at times, and especially and often with the latter, it's an attempt to avoid Ye Olde Problem of Evil. And, it fails.
I've blogged at my secondary blog how this ultimately falls prey to the Problem of Psychological Evil, discussed in a bit more detail here.