“You humans are always locking each other away. Cells. Dungeons. Some of your earliest jails were sewers, where men sloshed in their own waste. No other creature has this arrogance – to confine its own. Could you imagine a bird imprisoning another bird? A horse jailing a horse? As a free form of expression, I will never understand it. I can only say that some of my saddest sounds have been heard in such places. A song inside a cage is never a song. It is a plea.”