Googling can be fun. Entering the phrase "Man is free if he needs to obey no
person" provided two links.
The first link attributed the principle to
"Christianity" [http://www.usagold.com/gildedopinion/Scott.html].
The second link was a Lectures and Tutorials document of the University of
Glascow School of Law
[http://www.law.gla.ac.uk/Law/UploadedDocuments/Modules/8ZKV/2004/juris.doc]
which attributed the quotation to Kant. Perhaps we should start creating
googlean stemmata.
Nicholas J. Theocarakis