Time to Grow Up!

One of the difficult things of being a leader is dealing with people.  There are so many who have been saved for so many years and then do things that make you say "What?"  I've experienced so many people who whine, complain and act like children.  Mind you, these are grown adults but they will fight and bicker over the smallest of things.  Sometimes they are office staff members but many times they are members of the church.  You would think that some of them would know better.  I fully understand what Paul was saying when he said;
" Brothers, I could not address you as spiritual but as worldly--mere infants in Christ.  I gave you milk, not solid food, for you were not yet ready for it. Indeed, you are still not ready.  You are still worldly. For since there is jealousy and quarreling among you, are you not worldly? Are you not acting like mere men?" 1 Corinthians 3:1-3 (NIV)

He said it again in Hebrews 5:11-14 (NIV):

We have much to say about this, but it is hard to explain because you are slow to learn.  In fact, though by this time you ought to be teachers, you need someone to teach you the elementary truths of God's word all over again. You need milk, not solid food!  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."

People who do not grow in their faith are like children and as children they will fight over the smallest of things.  They will act childish in their relationships.  They will seldom be respectful or obedient but more likely will be selfish and rebellious in their behavior.
Lord, how do we grow up?  How do we get beyond this child-like behavior and begin acting mature?  You have already told us - we need to learn your word.  The more we study it, obey it and make it a part of our life; the more we will grow.  Lord, the world sees enough childish behavior, it's time for us to grow up.  Help me to be mature so that I may teach others.  We need grown, mature Christians as leaders so that the world will see you more clearly and not be blinded by the childish behavior of immature Christians.  It's time to grow up!