But oh, that I were young again
And held her in my arms.
- W.B. Yeats

These lines still make me shiver.

"Odi et amo. quare id faciam, fortasse requiris.
nescio, sed fieri sentio et excrucior.

I hate and I love. Why? you might ask.
I don't know. But I feel it happening and I hurt."

(Catullus 85, translation Anne Carson)