"[...] Consider rain."
"We curse the rain when it falls upon pur heads, yet without it we should starve. The world needs rain... and slaves. You make a face, but it is true. Consider Qarth. In art, music, magic, trade, all that makes us more than beasts, Qarth sits above the rest of mankind as you sit at the summit of this pyramid... but below, in place of bricks, the magnificence that is the Queen of Cities rests upon the backs of slaves. Ask yourself, if all men must grub in the dirt for food, how shall any man lift his eyes to contemplate the stars? If each of us must break his back to build a hovel who shall rise the temples to glorify the gods? For some men to be great, others must be enslaved."