[1] In 1999, he openly clashed with the newly appointed bishop of Groningen, Wim Eijk, over his views on sexuality,[2] publicly coming out as a homosexual priest.

[4] In 1989, Verbeek became the lead candidate for the Rainbow, a coalition of PPR, CPN, PSP, and the EVP, for the 1989 European Parliament election.

In 1994, he left GroenLinks and became the lead candidate for The Greens in the 1994 European elections, but the party did not meet the electoral threshold.

[7] The ecumenical songbook Zangen van Zoeken en Zien (2015) is dedicated to Herman Verbeek.

[8] In 2018, Dat gij het zingt, a collection of Verbeek's posthumous songs and reflections, was published, edited by Chris van Bruggen and Michaël Steehouder.