"Digging," by Seamus Heaney, contains multiple examples of figurative language. Figurative language, or poetic/rhetorical devices, is where an author manipulates language in order to make the text more vivid. Examples of figurative language used in Heaney's poem are as follows.
Repetition-- Repetition is where a word or phrase is repeated for effect. Line one contains repetition: "between my finger and my thumb."
Alliteration-- Alliteration is the repetition of a consonant sound within a line of poetry. Line one also contains alliteration: the repeated "m" sound in "my."
Simile-- A simile is a comparison between two unlike or dissimilar things (using "like" or "as"). Line two contains a simile: "The squat pen rests; snug as a gun." Here, a pen is compared to a gun.
Personification--Personification is the giving of human characteristics to non-human/non-living things. Personification can be found in line two: "The squat pen rests." Here, the pen (an inanimate object) rests (something humans, not pens, do).