God has made us His spiritual house in Christ in His Spirit.
1Therefore, rid yourselves of every kind of evil and deception, hypocrisy, jealousy, and every kind of slander. 2Like newborn babies, thirst for the pure milk of the word so that by it you may grow in your salvation. 3Surely you have tasted that the Lord is good! 4As you come to him, the living stone who was rejected by people but was chosen and precious in God’s sight, 5you, too, as living stones, are building yourselves up into a spiritual house and a holy priesthood, so that you may offer spiritual sacrifices that are acceptable to God through Jesus, the Messiah. 1 Peter 2:1-5 ISV
19 So then you are no longer strangers and foreigners, but you are fellow citizens with the holy ones and of the household of God, 20 being built on the foundation of the emissaries and prophets, Messiah Yeshua himself being the chief cornerstone; 21 in whom the whole building, fitted together, grows into a holy temple in the Lord; 22 in whom you also are built together for a habitation of God in the Spirit. Ephesians 2:19–22
John helps us understand how we can be a spiritual house, because Jesus the Messiah has made us to be a Kingdom, priests to his God and Father
4 Yochanan, to the seven assemblies that are in Asia: Grace to you and peace from God, who is and who was and who is to come; and from the seven Spirits who are before his throne; 5 and from Yeshua the Messiah, the faithful witness, the firstborn of the dead, and the ruler of the kings of the earth. To him who loves us, and washed us from our sins by his blood— 6 and he made us to be a Kingdom, priests to his God and Father—to him be the glory and the dominion forever and ever. Amen Revelation 1:4-6 .
In order to comprehend that, we need to dig into the Holy Spirit and understand it with kingdom perspective.
Jesus gives us kingdom perspective.
After Jesus was baptized in the Spirit, He began proclaiming the gospel of the kingdom. One of the very pertinent statements Jesus made regarded John the baptist. John was the last of the prophets of the old covenant. He came in the spirit of Elijah proclaiming Jesus as the promised Messiah. Yet, Jesus said of him: “Truly I tell you, among those born of women there has not risen anyone greater than John the Baptist; yet whoever is least in the kingdom of heaven is greater than he” (Mt 11:11 ISV).
Up until God poured out the Holy Spirit on the day of Pentecost, neither John the baptist or any born of a woman were in the kingdom of God. They had not been born again, regenerated, made new creatures. The moment we believed, God created us in Christ Jesus (Eph 2:10; Titus 3:4-6; 2 Cor 5:17; Gal 6:15).
When Nicodemus asked Jesus about being be born again. Jesus answered.
“Truly, truly, I tell you, no one can see the kingdom of God unless he is born again, ” John 3:3
“Truly, I tell you emphatically, unless a person is born of water and Spirit he cannot enter the kingdom of God. What is born of the flesh is flesh, and what is born of the Spirit is spirit. Don’t be astonished that I told you, ‘All of you must be born from above.’ The wind blows where it wants to. You hear its sound, but you don’t know where it comes from or where it is going. That’s the way it is with everyone who is born of the Spirit” (Jn 3:5-8 ISV).
In Christ Jesus, we Jews and Gentiles are made one. God has made us a new order of mankind, one new man in Christ, uniting two alienated sections of humanity in Himself so as to form one new man. Through Christ Jesus we both have our access in one Spirit unto the Father. (Eph 2:11-19). And, the kingdom of God is in the Spirit (Ro 14:17-18).