A Meteor of Knowledge

"To his features, as to all other objects, the meteoric light imparted a new expression, or it might well be that the physician was not careful then, as all other times, to hide the malevolence with which he looked upon his victim." (141-42)

This quote is referring to the look on Chillingworth's face when he saw Hester, Pearl, and Dimmesdale illuminated by the meteor. The meteor is used as a kind of flashlight - shining knowledge on the town. Chillingworth hates Dimmesdale for what he's done, and is out to destroy him. But, as Hawthorne reveals, he hides it well.