Londo: "If the Narns all stood together in one place and hated all at the same time, that hatred could fly across dozens of light years and reduce Centauri Prime to a ball of ash. That's how much they hate *us*." Sinclair: "You don't have to respond in kind." Londo: "Of course we do. It is a natural law. Physics tells us that for every action, there must be an equal and opposite reaction. They hate us, we hate them, they hate us back and so, here we are, victims of mathematics."
It seems that someone has actually made a t-shirt with Londo's "wisdom" on it. Check it out.
I like this one better, though. Because I have always been here.