Henry Morris commentary: "This distinctive name of God identifies Him as the one who is eternally self-existent. All created entities have a beginning, including time itself (Genesis 1:1). As creatures, we must reckon in terms of the past and future, but to the creator of time, all is present. He is transcendent to time as well as space."
Yes this is "mind-blowing" as mortals cannot comprehennd it. It is one of the secret things of Deut. 29:29: The secret things belong unto the LORD our God: but those things which are revealed belong unto us and to our children for ever, that we may do all the words of this law.
To all;
Here is a resource via a friend who passed it on to me:
http://orthochristian.com/99285.html
I found it to be full of great detail and insight- and so much easier than reading “SUMMA THEOLOGICA”, that great apologetic book by Aquinas.