The mature are not caught up in the worries, riches and pleasures of life, but rather are spiritually productive.
Lu 8:14 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.
The Mature understand advanced concepts of scripture
1Co 2:6 We do, however, speak a message of wisdom among the mature, but not the wisdom of this age or of the rulers of this age, who are coming to nothing.
The Mature are united in faith and agree on ideas among the mature
Eph 4:13 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.
Php 3:15 All of us 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.
The Mature are confident, fully assured of their salvation and cannot be moved from their convictions
Col 4:12 Epaphras, who is one of you and a servant of Christ Jesus, sends greetings. He is always wrestling in prayer for you, that you may stand firm in all the will of God, mature and fully assured.
The Mature because of their experience are able distinguish good from evil. They have discernment.
Heb 5:14 But solid food is for the mature, who by constant use have trained themselves to distinguish good from evil.