God is spirit. He cannot show up before human beings. The Bible tells us that he is spirit and that "no man has ever lived and seen God." (This is one clear indication that Jesus Christ is not God the Father.)
(Exodus 33:20) But he added: “You cannot see my face, for no man can see me and live.
Instead, the Bible gives us accounts of God as spirit exhibiting one of his cardinal attributes - Power:
(Genesis 1:1-3) In the beginning God created the heavens and the earth. 2 Now the earth was formless and desolate, and there was darkness upon the surface of the watery deep, and God’s active force was moving about over the surface of the waters. 3 And God said: “Let there be light.” Then there was light
This is where I stand. I will never see the face of God Almighty. What I do see daily are his wonderful works. They bear witness to who he is his majesty and his power, his love and wisdom and justice.
However, if you wish to know what it is like "when God shows up," consider
1. the experience of the ancient Egyptians and Pharaoh and his army: Exodus 5:1,2; Exodus 12:12; Exodus 13:20; 14:1-3; Exodus 1:13-31
Secular history supports these events as the name of the Pharaoh is erased from Egyptian history as was the custom with a failed ruler. The time frame the Bible account fits the time frame of the missing Pharaoh's rule.
2. The Fall of Babylon under King Belsshazzar to Cyrus the Great of the Medo-Persia as prophesied in Isaiah 5:1-8. Secular history supports the events and the dates.
3. One of my favorite is in the account of the prophet Elijah's being present when "God shows up."In this account, "God shows up, not to render judgement but to encourage his totally discouraged and frightened servant. Here is a portion of the account:
(1 Kings 19:9-13) There he entered a cave and spent the night; and look! Jehovah’s word came to him, telling him: “What are you doing here, E·liʹjah?” 10 To this he said: “I have been absolutely zealous for Jehovah the God of armies; for the people of Israel have forsaken your covenant, your altars they have torn down, and your prophets they have killed with the sword, and I am the only one left. Now they are seeking to take my life away.” 11 But He said: “Go out and stand on the mountain before Jehovah.” And look! Jehovah was passing by, and a great and strong wind was splitting mountains and breaking crags before Jehovah, but Jehovah was not in the wind. After the wind, there was an earthquake, but Jehovah was not in the earthquake. 12 After the earthquake, there was a fire, but Jehovah was not in the fire. After the fire, there was a calm, low voice. 13 As soon as E·liʹjah heard it, he wrapped his face in his official garment and went out and stood at the entrance of the cave. Then a voice asked him: “What are you doing here, E·liʹjah?
There will come a time in the relatively near future when God will show up? It is called Armageddon. What will you do?
(Ezekiel 38:23) And I will certainly magnify myself and sanctify myself and make myself known before the eyes of many nations; and they will have to know that I am Jehovah.
To learn more go to www.JW.org under publications find the book What Does the Bible Really Teach. Read chapter One and Three