Final answer:
The literary device used in the sentence 'Perhaps the guilt wouldn't have been so heavy...No final grip of the eyes' is a paradox.
Step-by-step explanation:
The literary device used in the sentence 'Perhaps the guilt wouldn't have been so heavy...No final grip of the eyes' is paradox. Paradox is a figure of speech that involves contradictory elements or ideas that appear to be contradictory but actually reveal a deeper truth. In this case, the sentence presents a contradictory image of guilt not being heavy and the absence of a final grip, which creates a paradoxical meaning. In this case, 'guilt' is described as being 'heavy' which attributes a physical characteristic to an emotion, and 'eyes' are said to have a 'grip,' which is typically a human action.