The Marks of Immaturity, and How to Keep Growing by John MacArthur
Selfishness is one telltale sign of immaturity. Babies are completely self-centered. They scream if they don’t get what they want when they want it. All they are aware of are their own needs and desires. They never say thanks for anything. They can’t help others; they can’t give anything. They can only receive.
And certainly there’s nothing wrong with that when it occurs in the natural stage of infancy. But to see a child whose development is arrested so that he never gets beyond that stage of helpless selfishness—that is a tragedy.
And that is exactly the spiritual state of multitudes in the church today. They are utterly preoccupied with self. They want their own problems solved and their own comfort elevated. Their spiritual development is arrested, and they remain in a perpetual state of selfish helplessness. It is evidence of a tragic abnormality.
Arrested infancy, in turn, results in a lack of discernment. Just as a baby crawls along the floor, putting anything it finds in its mouth, spiritual babies don’t know what is good for them and what isn’t. Immaturity and failure to be discerning go together; they are virtually the same thing.