How our minds accept things. Like in the case of word "moon". All that one imagines is a white celestial body circling the earth. And how wrong. "Moon" represents a class of bodies, though, it's the lack of such bodies around us that has led to us believe that there is only one. This sudden realization that there is a plethora of moons in our solar system only makes one also realize that how narrow it could get in one's minds.
I doubt there'll ever be life on Titan. Nevertheless, a trip? Whoa! Sure!