I Peter 2:2 as newborn babies, long for the pure milk of the Word, that with it you may grow,

 

The newborn baby refers to someone who has been born again.

John 3:1 Now there was a man of the Pharisees named Nicodemus, a ruler of the Jews. 2 The same came to him by night, and said to him, “Rabbi, we know that you are a teacher come from God, for no one can do these signs that you do, unless God is with him.”

3 Jesus answered him, “Most certainly, I tell you, unless one is born anew, he can’t see God’s Kingdom.”

4 Nicodemus said to him, “How can a man be born when he is old? Can he enter a second time into his mother’s womb, and be born?”

5 Jesus answered, “Most certainly I tell you, unless one is born of water and spirit, he can’t enter into God’s Kingdom. 6 That which is born of the flesh is flesh. That which is born of the Spirit is spirit. 7 Don’t marvel that I said to you, ‘You must be born anew.’ 8 The wind blows where it wants to, and you hear its sound, but don’t know where it comes from and where it is going. So is everyone who is born of the Spirit.”

Psalm 17:4 As for the deeds of men, by the word of your lips,
I have kept myself from the ways of the violent.

Psalm 119:9 How can a young man keep his way pure?
By living according to your word.