The text is very important in this song. So, if I decide to sing this song I'd make sure that my diction is very clear. Music is fit into the poetry. This piece is great example of modal mixture and text painting. If you would like to understand the poem you would have to know German very well, because English version is really poor ( so good luck).
The phrase structure is:
-2 m. of piano introduction
-voice starts on SOL DO (wann der )I64
I64, V I64, I64 V7, iii I64, I64 vi, IV V43/V, IV6 IV, viihd7/V V, V iv, flatVII7 flat III,
viidim i6 iihd65, V64-53-64-53 i minor IAC.
The cadence is on the end of the phrase.
traurig-sadly m11 D natural in the soprano sounds very sad ( VIflat), also leads to the key of D
taubenpaar-pair of doves m.17 I6 whit 9-8 goes to V64
wende mich-turn away m.22 vii43 /vi goes to vi6
Authentic cadence on the end.