Modern psychology takes completely for granted that behavior and neural
function are perfectly correlated, that one is completely caused by the
other. There is no separate soul or lifeforce to stick a finger into
the brain now and then and make neural cells do what they would not
otherwise. Actually, of course, this is a working assumption only....
It is quite conceivable that someday the assumption will have to be
rejected. But it is important also to see that we have not reached
that day yet: the working assumption is a necessary one and there is no
real evidence opposed to it. Our failure to solve a problem so far
does not make it insoluble. One cannot logically be a determinist in
physics and biology, and a mystic in psychology.
-- D. O. Hebb, Organization of Behavior: A Neuropsychological Theory, 1949
What's really important in life? Sitting on a beach? Looking at
television eight hours a day? I think we have to appreciate that
we're alive for only a limited period of time, and we'll spend most
of our lives working....