what's the aim of learning English?

what's the aim of learning English?
we pay a lot of attention to English
grammars and words for the whole
process of life.we sacrafice our
valuable time to delve into all
kinds of sentence meanings in the
dictionary.so for what?beside
that you can find a good job,
what else?read novels?but I
don't think there is too much
differece between westners'
thought and Chinese one.is
it worth spending so much time
studying it?
don't talk to me that english
makes you land a good job,
I mean eternal aims of learning
english,not just worldly aims.
job doesn't mean your life aims,
does it?