What is the purpose of the personification in the line ""My guilt yelled at me until I wept""?

The purpose of the personification is to show how badly he was battling with his conscience.

Explanation:

Personification is a literary device that gives human attributes to inanimate things.

From the line, "My guilt yelled at me until I wept", we can infer that his guilt "yelling" at him was to show him that what he did was wrong.

His guilt 'yelled' at him so much that his conscience was seriously disturbed and he wept,.

So, the purpose of the personification in the line,  ""My guilt yelled at me until I wept""? is to show how badly he was battling his conscience and eventually lost and broke down in tears.