Childish or Childlike

I have continued to ponder a few lessons from childhood. Jesus encouraged us to recongize the value of childlike faith. Obviously, there are childlike virtues that are very positive. I want to recover and cling to my sense of awe and wonder of God. However, there is a difference in "childlike" and "childish". Unfortunately, the two can be confused. When I hear the word "childish" the first synonym I think of is "selfish" followed closely by "immature". So is selfishness a problem among followers of Jesus today? For now, I will let you answer that question.