On Gospelcoalition.org there is an article entitled "A letter to Harold Camping and those who expected Judgement Day" by Timothy Dalrymple. It is a well balanced letter and worthy reading whether affected by the prediction or not.

When we say so and so is a mature Christian- what does it mean? If a person can quote scriptures, does it make him/her a mature christian? If person is gifted in some area of Ministry-does it make him/ her a mature christian? If a person is an Elder, Deacon does it mean one is a mature christian?

when a person gets saved and comes to church, mostly, we have Bible classes where we teach them what we think the Bible says and mostly it is what our Denomination teaches or believes in - is that the right way of discipling a new believer? Giving them head knowledge, is it good enough?

I have come to the conclusion that a mature christian is one who has closed the "gap" between what s/he knows is the teaching of the Scriptures and his/her practicall life.