1 Corinthians 3:1
And I could not speak to you, brothers, as I would to spiritual people, but [I have to speak to you] as I would to worldly people, for you are immature children in [the fellowship of] Christ.
1 Corinthians 2:14-15
Now the natural person [Note: Since this person is contrasted with the spiritual person of verse 15, it is taken here to mean the person without the Holy Spirit] does not receive the things [i.e., truths] revealed by the Holy Spirit of God, because they are [considered] foolishness to him. And he cannot understand them because they must be discerned by using spiritual judgment [i.e., judgment aided by the Holy Spirit].
Romans 7:14
For we know that the law of Moses is spiritual [i.e., from the Holy Spirit in origin and character], but I am fleshly, sold as a slave to sin. [Note: "Flesh" throughout this section refers to a person's natural inclinations to sin].
1 Corinthians 2:6
However, we speak [divine] wisdom among people who are [spiritually] mature, yet it is not a wisdom of this current age, nor of [its] current rulers, who are coming to nothing.
1 Corinthians 14:20
Brothers, do not be children in the way you think, but be babies in wrongdoing; yet be mature in your thinking.
Galatians 6:1
Brothers, if any one of you is overwhelmed by a [particular] sin, those of you who are spiritually minded should [attempt to] restore such a person [to faithfulness]. But do it in a gentle way, being very careful that you yourself do not become tempted [to get involved in any sin].
Ephesians 4:13-14
[This is to be done] until we all [eventually] arrive at unity of the faith and full knowledge of the Son of God; at complete [spiritual] maturity; at the [full] height of Christ's [spiritual] stature.
Hebrews 5:13
For everyone who has to drink "milk" is inexperienced in the teaching about righteousness, for he is [still] a [spiritual] baby.
Matthew 16:23
But Jesus turned to Peter and said, "Get away from me, Satan; you are causing a hindrance to me because you are not thinking about God's things but about men's."
1 Corinthians 3:3-4
for you are still worldly [minded]. And since there is jealousy and quarreling among you, is that not evidence that you are [still] worldly and living like [unspiritual] people?
1 John 2:12
I am writing to you, little children [i.e., dear ones], because you have been forgiven of your sins for [the sake of] Christ's name.