We all grow up from childhood.  We grow emotionally, physically, mentally and socially without trying and without thinking about it.  Nothing can stop this from happening.  It is a natural process that happens in all creatures.  it is a part of our creaturliness; a part of our flesh and blood-ness.  There is no person that does not outgrow clothes or toys.  We all feared girl or boy cooties when young but then moved on to love these cooties in our teen years.  We all grow and change naturally.  We are also spiritual.  Every creature is spiritual and has a spiritual need to have rely on something as their God - whatever gives them meaning or purpose in life.  The need to know the true God is natural, part of the creature.  But because this world is broken, along with our relationship with God, we do not naturally grow spiritual, otherwise it is outgrown....like the toys you once played with.  If it is not fed, it will not grow.  You may have left your faith in Sunday School and it may have never matured.   Listen and find out if you have outgrown your faith and what to do about it.