There is a difference in general definition, in which mysticism usually refers to an spiritual apprehension of knowledge inaccessible to the intellect, of ethereal import not apparent to the senses. Both can be broadly classed as supernatural, but supernatural acts of God are manifest miracles which violate natural laws. And which the living and true God is still doing, glory be to Him.
But the source of miracles by themselves are subject to testing by established Divine revelation, which miracles either confirm or contradict, being of God or the devil, as with the Egyptian magicians vs Moses.
Likewise the claim of any purported Divine revelation is subject to testing by established Divine revelation, which Scripture most assuredly is. And my reproof of you was that of your recourse of appeal to mysticism in order to support that which must be taught by the only wholly inspired substantive authoritative record of what the NT church believed, but which is not. Thus your appeal is more specious than that of Catholics whose recourse is to the uninspired words of men as determinitive of what the NT church believed.
To me, speculation regarding what an infant is aware of might be mysticism or possibly the understanding of future science. I dont know. To me, its anecdotal level info, but if its mysticism to you, thats okay with me.
As to whether or not an infant is a sinner, the usual response seems to be Romans 3:23: For all have sinned...
How an infant has sinned, I dont know, but the quote says all. Thats not mysticism to me.
As to the Eyes of our Creator being the first thing we see? That came from one of the messages in TLIG. I dont remember which or Id post it.
As to whether the messages in TLIG are mysticism or what they claim to be, that is still beyond my rank and pay grade. However, my first reaction was that its real.
However, I like stuff like that and my bias is always against placing the limits of my understanding or yours on what God is allowed to do or what His Gifts to us might be, especially so the closer we get to the end of the story.
Thats just my humble opinion, of course.