Interesting post!
I love that one from Eternal Sunshine....made a huge impact on me
Another fave is from that fabulous love story -Tristan & Isolde, for me, it's so touchingly poignant.
"My face in thine eyes, thine in mine appears,
And true plain hearts do in the faces rest;
Where can we find two better hemispheres,
Without sharp north, without declining west?
Whatever dies, was not mixed equally;
If our two loves be one, or thou and I.
Love so alike, that none do slacken, none can die."
---John Donne - 'Good Morrow'