To me the following are possibly the best lines FB has ever written:
"Wise is the tongue, wet of perfect though And softest neck where always do I Lay my clumsy thoughts"
The whole song is perfect but damn this caught me off guard in the car the other day. I had to listen to it on repeat.
The whole end part of the song is particularly brilliant. And it's an acrostic poem. And it's in the form of a Shakespearean sonnet. And it just flows so effortlessly.