Is the seal of God a literal/physical mark in the foreheads of the saved?
Rev 7:2 And I saw another angel ascending from the east, having the seal of the living God: and he cried with a loud voice to the four angels, to whom it was given to hurt the earth and the sea,
Rev 7:3 Saying, Hurt not the earth, neither the sea, nor the trees, till we have sealed the servants of our God in their foreheads.
Rev 9:4 And it was commanded them that they should not hurt the grass of the earth, neither any green thing, neither any tree; but only those men which have not the seal of God in their foreheads.
Rev 14:1 And I looked, and, lo, a Lamb stood on the mount Zion, and with him an hundred forty and four thousand, having his Father’s name written in their foreheads.
Scripture interprets scripture in this case:
2 Corinthians 1:22 — The New King James Version (NKJV)
22 who also has sealed us and given us the Spirit in our hearts as a guarantee.
The anti-christ is a possessed human and will use physical means.
The Lord uses spiritual means AND explains them.