UNDEFINABLE INDIVIDUAL

I chanced upon a question, "How do you define yourself?" and afterwards I read the replies. One of it which caught my attention was that a person said, "Nothing. If I were to define myself, it would mean that I am definable." That was really cool. What makes you think that you won't change throughout the years? How do you know your traits will always stay stagnant? And to be undefinable will lead to a much more adventurous and interesting life filled with spur of the moments and unexplainable scenarios and actions, because: who wants to live life mundane?