What it means to be an open theist: Calvinists and even Arminians believe God is everywhere. This sounds almost pious; afterall, does this not give glory to God. The answer is emphatically. No.
“The Lord looks down from heaven upon the children of men, To see if there are any who understand, who seek God.”
If God was everywhere, this verse would be meaningless. There would be no place that would be holy. It would mean the same thing to say God looks up from hell on the children of men. Only by appreciating the meaning of the words and divorcing oneself from the Platonic and Calvinist perspective on the omnipresence of God, can one truly appreciate and honor the meaning of Scriptures. Often a Calvinist has to destroy the communication of the Scriptures to protect his Platonic vision of God. Omnipresence is negative theology: negative theology defines God by what He is “not”. Omnipresence means God is not in any place, therefore he is everywhere. But this is counter by a basic reading of Scripture:
2 Thessalonians 1:9
“2 Thess 9 These shall be punished with everlasting destruction from the presence of the Lord and from the glory of His power,”
Negative theologians also deny the punishment of the unbelievers as described in 2 Thessalonians 1:9. Are those who die in disbelief truly separated from God forever? Are there beings who are not in the presence of the Lord? If God is everywhere then all souls will always be in the presence of God and this verse becomes meaningless. When this happens, God actually becomes the lessor god of the Platonic vision and his true character is lost. Only an open theist can truly honor God as he is.