What figurative language device is present in "I am glad to the brink of fear"?

The phrase "I am glad to the brink of fear" utilizes hyperbole, which is an exaggerated statement that is not meant to be taken literally but is used for emphasis or to convey strong feelings. In this case, the speaker expresses an intense emotion by juxtaposing "glad" and "fear." This contrast emphasizes the depth of the speaker's gladness to the extent that it creates a feeling of tension or anxiety, suggesting that their happiness is so profound that it borders on being overwhelming or frightening. This hyperbolic expression effectively highlights the complexity of the speaker's emotions, illustrating how joy and fear can coexist.

Other choices like simile, metaphor, and idiom do not accurately capture the exaggerated aspect of the statement or its emotional impact in the same way that hyperbole does. Simile involves direct comparisons using "like" or "as," metaphor asserts an identity between two unrelated things, and idioms are expressions whose meanings are not derived from the literal interpretation of the words. None of these devices match the function of hyperbole in this context.