Holden's Immaturity Twoard the Adult world

What does maturity mean to you? To me it is where an individual had gotten to a certain where he understands what life is all about.
Or even something or someone that isn't normal in all ways or just in some? Phony is one of the words in the English literature that can have an endless amount of interpretations. Can be being phony possibly hinder an attempt to accomplish a task to fully function mentally? Can phony delay an individuals maturing period? In J.D. Salinger's Catcher in the Rye, Holden's "phony phobi...