There exists out there in the un-broached void of night and in the deeper darkness beyond, things so terrible and vile that they would devour us and destroy everything we have made. And why? Because they fear us – and rightfully so, for we are humanity and the stars are ours.

"It's Horrible!""It's not true!""How vicious and selfish!"

"Senor d'Anconia, I don't agree with you!"

"If you can refute a single sentence I uttered, madame, I shall hear it gratefully."

"Oh, I can't answer you.  I don't have any answers, my mind doesn't work that way, but I don't feel that you're right, so I know that you're wrong."

"How do you know it?"

"I feel it.  I don't go by my head, but by my heart.  You might be good at logic, but you're heartless."

"Madame, when we'll see men dying of starvation around us, your heart won't be of any earthly use to save them.  And I'm heartless enough to say that when you'll scream, 'But I didn't know it!'--you will not be forgiven."

pretty much sums it up.