I think it comes down to this question: Is science something you DO, or is it something you ARE?
For some scientists, science is an activity – one out of many modes of thought and action in the human repertoire. For other scientists, science is a large part of who they are – it answers their questions, fulfills their emotional needs, and gives them a sense of identity and importance. The former love doing science. The latter love being scientists. The former consider science a massively powerful tool for the survival and betterment of mankind. The latter consider science a massively powerful tool for the survival and betterment of their egos.





