Here, there was the taint of deepest sin in the most sacred quality of human life, working such effect, that the world was only the darker for this w… - Nathaniel Hawthorne

he seemed to be in quest for mental food, not heart sustenance.

The white-haired father now approached Ethan Brand, and gazed steadily into his face.
"They tell me you have been all over the earth," said he, wringing his hands with earnestness. "You must have seen my daughter, for she makes a grand figure in the world, and everybody goes to see her. Did she send any word to her old father, or say when she was coming back?"
Ethan Brand's eye quailed beneath the old man's. That daughter, from whom he so earnestly desired a word of greeting, was the Esther of our tale, the very girl whom, with such cold and remorseless purpose, Ethan Brand had made the subject of a psychological experiment, and wasted, absorbed, and perhaps annihilated her soul, in the process.

Sometimes a light glimmered out of the physician's eyes, burning blue and ominous, like the reflection of a furnace, or, let us say, like one of those gleams of ghastly fire that darted from Bunyan's awful doorway in the hill-side, and quivered on the pilgrim's face.