Christians are temples of God the Holy Spirit
From Billy Graham, Decision Magazine,
"The Holy Spirit has all knowledge. The Bible says, “The Spirit searches all things, yes, the deep things of God” (1 Corinthians 2:10). It is the Holy Spirit who teaches us and takes us deeper and deeper into God’s truth as we go along in our Christian life. We are to grow in the grace and knowledge of Christ, but we can grow only by the help of the Holy Spirit. The moment that we receive Christ as Savior, the Holy Spirit comes to live in our hearts. Our body becomes the temple of the Holy Spirit, and the Holy Spirit helps us live the Christian life.
The Holy Spirit is not an “it.” The Holy Spirit is a Person. The Bible says that He is not something, He is Someone. He is God. There are three Persons in the Trinity–God the Father, God the Son and God the Holy Spirit. The Bible teaches that the Holy Spirit is all-powerful. We read in Micah 3:8, “I am full of power by the Spirit of the Lord.” The Bible says that God is present everywhere. No matter where we go, He is there. “Where can I go from Your Spirit? Or where can I flee from Your presence?” (Psalm 139:7).