This "glory in the midst" is evidently the life that shines into the heart of man. It's an indwelling, internal, glowing, burning, sparkling, consuming fire that purges out dross, cleanses and purifies the nature, and keeps a man holy and clean. It is also the same light that is referred to by one of the other divine writers when he said, "Thy word is a lamp unto my feet, and a light unto my path" (Ps. 119: 105). In a sense it is a miniature "pillar of fire by night" and "pillar of the cloud by day." When God led Israel out of bondage, He put a great pillar of fire and cloud both day and night, but He was then leading an army of probably two or three million people, and a pillar of cloud and fire to lead one man need not be nearly so large as one to lead millions.
But the light that lit up the path for the Israelites and blinded the eyes of the Egyptians is the very same thing to us today. Pharaoh and his host are a type of the devil, and while God gave guiding light to His people, the same light was so blinding and bewildering to the Egyptians that God hindered them in their progress. The same thing with us, the glory of God in the midst of us makes it dark and bewildering to the devil.
That is one reason why the devil does so many foolish things when he is trying to defeat one of God's children. It is often the case that the very thing that the devil does to defeat a saint proves to be the best thing for the saint and the worst thing for the devil. Many of the schemes that the devil gets up to defeat the saint of God prove to be a booster to the saint, and a great hindrance to the devil himself. It is made plain in Ezekiel's vision. He saw a wheel within a wheel, and it seemed that the inner wheel was on fire. The sparks were flying in every direction, which means that out from the glory there is a power that will throw a circle of light and protection around a man for a hundred feet in every direction. Isaiah calls it a way within a way, while Ezekiel calls it "a wheel within a wheel."
Robinson, Reuben A. (Bud). The Collected Works of 'Uncle Bud' Robinson (Kindle Locations 3187 - 3200). Jawbone Digital. Kindle Edition.