Sci-fi fans are the most loyal fans on the planet - there's no doubt about it. I've done a few of those conventions, and these people will know the lines!
“It is folly for a man to pray to the gods for that which he has the power to obtain by himself.”
“A friend who is far away is sometimes much nearer than one who is at hand. Is not the mountain far more awe-inspiring and more clearly visible to one passing through the valley than to those who inhabit the mountain?”