does Matthew 18:3 have no context?
Anyone who lives on milk, being still an infant, is not acquainted with the teaching about righteousness. But solid food is for the mature, who by constant use have trained themselves to distinguish good from evil. Therefore let us move beyond the elementary teachings about Christ and be taken forward to maturity
(Hebrews 5:13-6:1)
Let perseverance finish its work so that you may be mature and complete, not lacking anything.
(James 1:4)
So Christ himself gave the apostles, the prophets, the evangelists, the pastors and teachers, to equip His people for works of service, so that the body of Christ may be built up until we all reach unity in the faith and in the knowledge of the Son of God and become mature, attaining to the whole measure of the fullness of Christ.
Then we will no longer be infants, tossed back and forth by the waves, and blown here and there by every wind of teaching and by the cunning and craftiness of people in their deceitful scheming. Instead, speaking the truth in love, we will grow to become in every respect the mature body of Him who is the head, that is, Christ. From Him the whole body, joined and held together by every supporting ligament, grows and builds itself up in love, as each part does its work.
(Ephesians 4:11-16)
He is always wrestling in prayer for you, that you may stand firm in all the will of God, mature and fully assured.
(Colossians 4:12)
All of us, then, who are mature should take such a view of things. And if on some point you think differently, that too God will make clear to you.
(Philippians 3:15)
The seed that fell among thorns stands for those who hear, but as they go on their way they are choked by life's worries, riches and pleasures, and they do not mature.
(Luke 8:14)
are all these about tongues?
i think there is a running theme in the NT teaching that we should not remain as children, but grow in Him to maturation, being adult in our thinking, leaving childish ways behind & increasing in the knowledge of God.
do you see a parallel theme in scripture teaching us to accept everything without examining it?