A famosa canção germânica "Die Gedanken Sind Frei"

Die Gedanken sind frei
http://www.songfacts.com/detail.php?id=23068

Obs.: A autoria é desconhecida mas a canção tem raízes profundas na Idade Média, e, segundo alguns estudiosos, até mesmo na Antiguidade.

Trechos de um artigo muito bom na Wikipedia sobre isto:                                       

  "... The original lyricist and the composer are unknown, though the most popular version "Aus Neukirch bei Schönau" (today Nowy Kościół) was rendered by Hoffmann von Fallersleben in his 1842 collection Schlesische Volkslieder mit Melodien (Silesian folk songs with melodies). ..." E, mais adiante: "... The idea represented in the title—that thoughts are free—was expressed as early as in antiquity[1] and became prominent again in the Middle Ages, when Walther von der Vogelweide (c.1170–1230) wrote: joch sint iedoch gedanke frî ("yet still thoughts are free").[2] In the 12th century, Austrian minnesinger Dietmar von Aist (presumably) had composed the song Gedanke die sint ledic vrî ("only thoughts are free"). About 1229, Freidank wrote: diu bant mac nieman vinden, diu mîne gedanke binden. ("this band may no one twine, that will my thoughts confine"). ..."

In 

https://en.wikipedia.org/wiki/Die_Gedanken_sind_frei

https://www.youtube.com/watch?v=gmwTa9qRq0o

Artigo da Wikipedia em alemão:

https://de.wikipedia.org/wiki/Die_Gedanken_sind_frei

Página do Goethe Institute em alemão sobre o assunto:

http://www.goethe.de/lrn/prj/gad/dgf/deindex.htm

http://www.goethe.de/lrn/prj/gad/dgf/deindex.htm

Linda 'cover' em inglês cantada de modo doce e suave:
https://www.youtube.com/watch?v=Fq-jBcipGEs#t=63

Tradução inglesa linha por linha do original alemão na tela:
https://www.youtube.com/watch?v=JS2pwy_Y8xQ

Outros links:
http://www.lieder-archiv.de/die_gedanken_sind_frei-notenblatt_300470.html


http://www.handmann.phantasus.de/g_diegedankensindfrei.html

http://www.labbe.de/liederbaum/index.asp?themaid=60&titelid=361

Letra original alemã com tradução inglesa:

http://lyricstranslate.com/en/die-gedanken-sind-frei-thoughts-are-free.html

http://myweb.dal.ca/waue/Trans/Anonymous-Gedanken.html

Vários links para diferentes gravações da canção:
https://www.youtube.com/results?search_query=Die+Gedanken+sind+Frei