“We’ve been listening into and watching your planet’s radio and television transmissions ever since Reginald Fessenden proclaimed, ‘Glory to God in the highest, and on earth peace to men of good willies’, back in 1906. Since then, our research at the University of Weagu Tafrid has focused primarily on the concept of human “celebrity.””
Intergalactic Fame (29 July 2011)
Captain Jul's Mission Blog (2011 - 2013)
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Yakoub Islam 10
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Interview with Louis Theroux on Weird Weekends (2 June 1999)

Google search of the second sentence, in quotes, yields a trio of 2019 books alone, most (there and in following) attributing it to Kepler—e.g., see Prof Basden's 2019 work, [Foundations and Practice of Research: Adventures with Dooyeweerd's Philosophy, The Complex Activity of Research [§10—4.1 Less-Obvious Pistic Functioning in Research], Advances in Research Methods, Abingdon-on-Thames, UK, Taylor & Francis-Routledge, 1st, 9781138720688, https://www.amazon.com/Foundations-Practice-Research-Adventures-Dooyeweerds/dp/1138720682, February 25, 2020] (page 222).
While most citations of Kepler have been traced back to a translation of an original work, this quotation appears broadly without any such sourcing (e.g., Basden). Where it is sourced, the sources are either spurious (e.g., to the "New World Encyclopedia", a Paragon House/Unification Church product https://www.nytimes.com/1984/04/02/arts/unification-church-is-starting-a-publishing-house.html, wherein it is likewise unsourced), or to such sources as Henry Morris' 1988 creationist work, [Men of Science, Men of God: Great Scientists Who Believed the Bible, Green Forest, AR, Master Books, 21st reprint, 9780890510803, https://www.amazon.com/Men-Science-God-Henry-Morris/dp/0890510806, February 25, 2020] (page 21f).
Until a scholarly source is found that ties these statements to an original text from Kepler, they formally must be considered unattributed to Kepler.
Disputed quotes

O little Town of Bethlehem, 2nd stanza http://books.google.com/books?id=Uh03AAAAMAAJ&q=%22O+morning+stars+together+Proclaim+the+holy+birth+And+praises+sing+to+God+the+King+And+peace+to+men+on+earth%22&pg=PA15#v=onepage (1868).

Source: Russell Hotten. " Yanis Varoufakis: In his own words http://www.bbc.co.uk/news/business-31111905" at bbc.co.uk, 3 February 2015; On the austerity terms of Greece's €240bn bailout

Toutes choses sont dites déjà; mais comme personne n'écoute, il faut toujours recommencer.
Le Traité du Narcisse https://fr.wikisource.org/wiki/Le_Trait%C3%A9_du_narcisse (The Treatise of the Narcissus)
Nothing is said that has not been said before. -- Terence

“Since the Lord suffered humiliation on the earth, we should not seek glory here.”
Source: Separation from the World, p. 8