Catullus 85

Its declaration of conflicting feelings, "I hate and I love", is renowned for its drama, force and brevity.

[1] The meter of the poem is the elegiac couplet.

Quārē id faciam fortasse requīris.

Nesciŏ, sed fierī sentiō et excrucior.

I know not, but I feel it happening and I am tortured.