Here is another important description of the Holy Ghost, and I hope you will get It right.
The Holy Ghost is a SEAL
Ephesians 4:30 And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption.
Ephesians 1:13 In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise,
1:14 Which is the earnest of our inheritance until the redemption of the purchased possession, unto the praise of his glory.
When you receive the baptism of the Holy Ghost, it signifies that the Lord Jesus Christ has redeemed you with His own Blood, and has made your body His dwelling place. Therefore you become a part of Him.
You now have eternal security within your soul. You are now complete in Him, a truly heaven-bound creature.
You have now received the Spirit of God which gives you eternal life.
You either have the Mark of God which is the Holy Spirit, the Seal of God or the Mark of the Beast which is the Mark of the Devil.
Why? Because those who are not sealed with the Holy Ghost receive the Mark of the Beast.
Revelation 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.
Revelation 19:20 And the beast was taken, and with him the false prophet that wrought miracles before him, with which he deceived them that had received the MARK of the BEAST, and them that worshipped his image. These both were cast alive into a lake of fire burning with brimstone.
The Mark of the Beast is not some kind of tattoo you receive on your forehead or on any other part of your body.