Quick answer, Baptized with the ever indwelling Holy Spirit.
Some supporting scripture:
John 14:17 Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you.
(NOTE: Spirit is capitalized showing deity = Holy Spirit. Dwelling with & in you)
1 Corinthians 6:19 What? know ye not that your body is the temple of the Holy Spirit which is in you, which ye have of God, and ye are not your own?
(NOTE: The Holy Spirit which is IN you)
1 Corinthians 12:13 For by one Spirit are we all baptized into one body, whether we be Jews or Gentiles, whether we be bond or free; and have been all made to drink into one Spirit.
NOTE: Spirit is capitalized showing deity = Holy Spirit. Baptized by Christ with/in the Holy Spirit. A Spiritual circumcision done without hands & without water)
1 John 4:15 Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world.
(NOTE: Greater is he = God the Holy Spirit thats IN you. Then the deceiver/satan who's in the world)
At savlation Jesus baptizes us, places his HOLY SPIRIT in us Matt 3:11, Lk 3:16, Mk 1:8. It's God's Seal, Down Payment, deposit, Guard, pledge.
ITS A GUARANTEE HE'S COMING FOR US!
Eph 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
(NOTE: When you believed, you were "SEALED" by the HOLY SPIRIT, a promise of God)
Eph 1:14 Which is the down payment of our inheritance until the redemption of the purchased possession
(NOTE: The HOLY SPIRIT the you were SEALED with is GODS down payment on your salvation)
Eph 4:30 grieve not the holy Spirit of God, whereby ye are "sealed" unto the day of redemption
(NOTE: GODS HOLY SPIRIT IS A SEAL given unto you receive your incorruptible heavenly body (1 Cor 15:42-44-53) on the day of redemption)
Tim 1:14 The Holy Spirit who dwells within us, guard the good deposit entrusted to you
(NOTE: God gives us the HOLY SPIRIT as a deposit. To guard us until the final day of redemption)
2 cor 1:22 Who hath also "sealed us" & "given the earnest" of the Holy Spirit in our hearts
(NOTE: God has SEALED us with a down payment of the HOLY SPIRIT)
2 Cor 5:5 God, who also hath given unto us "the earnest" of the Spirit
(NOTE: God have given us the HOLY SPIRIT as a down payment = the earnest)