"Our two minds .... One is an act of the emotional
mind, the other of the rational mind. In a very
real sense we have two minds, one that thinks and
one that feels" (Daniel Goleman, Emotional
Intelligence, Bloomsbury Publishing, London, 1996,
page 8). This rational mind is also called the
faculty of logic and reason.
The Upanishads say that these two are opposite in
nature. Modern psychologist also have observed it,
but they are not very sure about it:
"At the same time, reason sometimes clearly seems
to come into conflict with some desires (even
while not being in conflict with others) giving us
the impression that reason is separate from
emotion".
http://en.wikipedia.org/wiki/Reason
However, logic has a drawback.
In the 1930s, Austrian mathematician Godel proved a
theorem which became the "Godel theorem" in cognition
theory. It states that any formalized 'logical' system
in principle cannot be complete in itself. It means
that a statement can always be found that can be
neither disproved nor proved using the means of that
particular system. To discuss about such a statement,
one must go beyond that very logic system; otherwise
nothing but a vicious circle will result. Psychologist
say that any experience is contingent - it's opposite
is logically possible and hence should not be treated
as contradictory.
http://www.search.com/search?q=godel+incompleteness+theorem
The emotional mind works dominantly in theists and the rational
mind works dominantly in atheists.