Conflict of the heart and brain

Is it the idea,
the dream,
the thought of something
that makes us love it so much?
How can we tell
in our heart,
our soul,
our mind,
that what we feel is real?
Do we no the difference
between our desire
and our lust for desire?
for what is there to tell you,
to warn you,
that its not what you want?
Do we follow our instincts
or allow our wants to lead the way?
Do we follow our hearts
or let our brain do the talking?