- The Spirit is the truth. Joh 6:63b
- The Lord is the Spirit. 2 Cor 3:17
- The words (rhema) of Jesus are spirit and are life. 1 Joh 5:6b
And the Word (logos) appeared in flesh and tabernacled among us, and we beheld His glory, the glory as of the only begotten of the Father, complete of Grace and Truth. Joh 1:14
The angel replied, “The Holy Spirit will come upon you, and the power of the Most High will overshadow you. Therefore the child to be born will be holy; he will be called the Son of God. Lc 1:35 Version [NET]
Consider the impartial understanding for 1 Cor 6:17:
And we know that the Son of God has come and has given us insight to know him who is True, and we are in him who is True, in his Son Jesus Christ. This True one is the God and Eternal life. 1 Joh 5:20.
The demonstrative Pronoun “This” is declined in the Nominative, singular, masculine and “Jesus Christ” is declined in the Dative. The word near to the nominative pronoun “This”, that also is in the nominative case is "True", quoted contextually in the verse.
Jesus answered, “I tell you the solemn truth, unless a person is born of Water and Spirit, he cannot enter the kingdom of God. John 3:6
In John 4:4,14c,24 - He says:
But whoever drinks some of the water that I will give him will never be thirsty again, but the water that I will give him will become in him a fountain of water springing up to eternal life.” (Jo 4:14 [NET]) See also Ver 7:17, 21:6, 22:1, 22;17.
Christ talks with a woman of Samaria, and reveals himself unto her
4 But he had to pass through Samaria. 5 Now he came to a Samaritan town called Sychar, near the plot of land that Jacob had given to his son Joseph. 6 Jacob’s well was there, so Jesus, since he was tired from the journey, sat right down beside the well. It was about noon. 7 A Samaritan woman came to draw water. Jesus said to her, “Give me some water to drink.” 8 (For his disciples had gone off into the town to buy supplies.) 9 So the Samaritan woman said to him, “How can you – a Jew – ask me, a Samaritan woman, for water to drink?” (For Jews use nothing in common with Samaritans.) 10 Jesus answered her, “If you had known the gift of God and who it is who said to you, ‘Give me some water to drink,’ you would have asked him, and he would have given you living water.” 11 “Sir,” the woman said to him, “you have no bucket and the well is deep; where then do you get this living water? 12 Surely you’re not greater than our ancestor Jacob, are you? For he gave us this well and drank from it himself, along with his sons and his livestock.” 13 Jesus replied, “Everyone who drinks some of this water will be thirsty again. 14 But whoever drinks some of the water that I will give him will never be thirsty again, but the water that I will give him will become in him a fountain of water springing up to eternal life.” 15 The woman said to him, “Sir, give me this water, so that I will not be thirsty or have to come here to draw water.” 16 He said to her, “Go call your husband and come back here.” 17 The woman replied, “I have no husband.” Jesus said to her, “Right you are when you said, ‘I have no husband,’ 18 for you have had five husbands, and the man you are living with now is not your husband. This you said truthfully!” 19 The woman said to him, “Sir, I see that you are a prophet. 20 Our fathers worshiped on this mountain, and you people say that the place where people must worship is in Jerusalem.” 21 Jesus said to her, “Believe me, woman, a time is coming when you will worship the Father neither on this mountain nor in Jerusalem. 22 You people worship what you do not know. We worship what we know, because salvation is from the Jews. 23 But a time is coming – and now is here – when the true worshipers will worship the Father in spirit and truth, for the Father seeks such people to be his worshipers. 24 God is spirit, and the people who worship him must worship in spirit and truth.”
God is a spirit, and not a body, or a corporeal substance. The nature and essence of God is like a spirit. See the Greek construction in Septuagint 2 Ki 9:4; Psa 78:5; Amo 5;6; Jer 4;4; Dat 2;35 and Jam 3:6.
What does "spirit" mean in John 3:6 (in bold)?
Repost: The nature (theotes) and essence (hypóstasis) of God. See Cl 2:9 and Heb 1:3.