Colum Mccann said this quote

The Irish were poor, but not enslaved. He had come here to hack away at the ropes that held American slavery in place. Sometimes it withered him just to keep his mind steady. He was aware that the essence of proper intelligence was the embrace of contradiction. And the recognition of complexity was to be balanced against the need for simplicity. He was still a slave. Fugitive. If he returned to Boston he could be kidnapped at any time, taken south, strapped to a tree, whipped. His owners. They would make a spectacle of his fame. They had tried to silence him for many years already. No longer. He had been given a chance to speak out against what had held him in chains. And he would continue to do so until the links lay in pieces at his feet.