Christians use the term “Mature Christian” sometimes to show they are more knowledgable in the things of the Bible or to show off their time or “experience” of being a Christian.
Usually, Christians equate Maturity to behaviour. Believing improvement in outward behaviour is the sign of a mature Christian. Praying a lot, Charity, fasting or Bible knowledge does not imply maturity.
Unfortunately, this is the basis according to which people discern and choose a church.
A sign of a Mature Christian
Sign of a Mature Christian is when the person sees Jesus and his finished works on the cross in pages of the Bible. When he/she reads the Bible she does NOT see what he/she should do or should not do, but sees Jesus in every event, commands, rituals and stories of the old testament.
And beginning at Moses and all the prophets, he expounded unto them in all the scriptures the things concerning himself.
~ Luke 24:27
A baby Christian always goes behind things like morality or what we should do or on what we shouldn’t do. A baby Church always goes behind philosophy, rules, tradition, reader’s digest stories.
A sign of a Mature Church
A good pastor or a preacher expounds and shows Jesus from the pages of the Bible. Concentrates on Christ’s Righteousness instead of showing people their sin or making people feel dirty about their sin.
Then Rebekah lifted her eyes, and when she saw Isaac she dismounted from her camel; for she had said to the servant, “Who is this man walking in the field to meet us?” The servant said, “It is my master.”
~ Genesis 24:64-65
A sign of a mature church is when it always craves to know more about Jesus. The bride (the church) always asks the servant (Holy Spirit) to tell her more about Jesus (the Bridegroom). The father God points everyone to Jesus and the Holy Spirit point everyone to Jesus.