6 Bible Verses about Middle Age

until we all attain to the unity of the faith and of the knowledge of the Son of God, to become mature, to the measure of the stature of the fullness of Christ. As a result, we are no longer to be children, tossed here and there by waves and carried about by every wind of doctrine, by the cunning of men, by their craftiness in deceitful scheming.

Yet we do speak a wisdom among the mature, a wisdom, however, not of this age nor of the rulers of this age, who are passing away.

About this we have much to say which is hard to explain, since you have become dull of hearing. For though by this time you ought to be teachers, you need someone to teach you again the first principles of God's word. You need milk, not solid food; for every one who lives on milk is unskilled in the word of righteousness, for he is a babe.read more.
But solid food is for the mature, for those who have their sense trained by practice to distinguish good from evil.

And let endurance have its perfect result, so that you may be perfect and complete, lacking in nothing.

And the child grew and became strong in spirit, and he was in the wilderness till the day of his manifestation to Israel.

And the child grew and became strong; he was filled with wisdom, and the grace of God was upon him.