Verses 1 to 5 of John 9. 

As Jesus was walking along, he saw a man who had been blind from birth. “Rabbi,” his disciples asked him, “why was this man born blind? Was it because of his own sins or his parents’ sins?”

“It was not because of his sins or his parents’ sins,” Jesus answered. “This happened so the power of God could be seen in him. We must quickly carry out the tasks assigned us by the one who sent us. The night is coming, and then no one can work. But while I am here in the world, I am the light of the world.”