‘Voor behoedmiddelen’ in de rots 16 (1986) Nr.9, pp. 5-6
‘Arguments for divorce ignore fundamental moral truths’ (Rite and Reason column) in The Irish Times, 21 November 1995
‘A prophetic voice’ in The Irish Catholic, 23 July 1998; in Irish Independent, 30 July 1968. An expanded version appeared in a German translation by Lore Bartholomäus in Deutsche Tagespost, 26 September 1998.
‘Why Archbishop Connell’s lecture touched a raw nerve’, The Irish Examiner, 3 March 1999. Also published in The Irish News, 10 March 1999 as ‘A la carte morality and designer genes’.
‘Difficult theological questions raised by O’Connor’s “ordination' in The Irish Times, 27 April 1999.
Submission to The All-Party Oireachtas Committee on the Constitution, Fifth Progress Report: Abortion, November 2000, A577-A578.
‘Designer Babies’ in The Word, 50/8 (August 2001), 4-6.
‘Zur Berichterstattung über den Konflikt in Nordirland’, in Die Tagespost, 12 August 2001.
‘Plurality should not deteriorate into ambiguous pluralism’ (Rite and Reason column) in The Irish Times, 27 January 2003.
‘The Catholic Church Today Lacks a Passion for Truth’ (Rite and Reason column) in The Irish Times, 14 April 2003.
‘The unborn child stirs the world’s conscience’ in The Irish News, 24 February 2004
'The Second Vatican Council' in The Word, May 2004
'What does ‘Catholic’ mean?' in The Word, January 2005
'Is the Church Holy?' in The Word, February 2005
'What is Natural Law?' in The Word, March 2005
'What is meant by Life Everlasting?' in The Word, November 2005
'Is there a Gospel for the rich' in The Word, December 2005
'Is there only One Church?' in The Word, January 2006
'Can a Catholic vote for ‘Civil Unions’ in The Word, February 2006
'May separated spouses receive Communion?' in The Word, March 2006
'Test-Tube Babies: May a couple use IVF?' in The Word, April 2006
'The Church always pays for the sins of the past', Letter to the Editor of the Irish Examiner, published on 15th June 2006
'The Mystery of the Holy Trinity' in The Word, June 2006
'What is Purgatory?' in The Word, November 2006
'St Joseph' in The Word, December 2006
'Is Religion an Obstacle to Progress', in The Word, January 2007
'Ein Dissident wider den Zeitgeist' in Bayern-Kurier, 14 April 2007
'Why the furore about Hell?' in The Word, June 2007
'Der Schüssel ist Humanae Vitae – Interview mit Stephan Baier und Stefan Reider', in Der Tagespost, 4 August 2007
'Why venerate the Angels?' in The Word, September 2007
'What is the Church’s Mission' in The Word, October 2007
'Is Evolution compatible with Creation?' in The Word, November 2007.
'What do the Ox and the Ass in the Crib signify?' in The Word, December 2008.
'What is meant by an informed conscience?' in The Word, January 2008.
'Why fast during Lent?' In The Word, February 2008.
'What does the Resurrection mean?' In The Word, March 2008.
'What is the connection between Human Rights and Humanae Vitae?' in The Word, April 2008.
'What is the message of Knock?' In The Word, May 2008.
'What is the Relationship between democracy and the Church?' in The Word, June 2008
'Preparing for the Eucharistic Congress' in The Irish Catholic, July 17, 2008.
'40 years after Humanae Vitae' in The Irish Catholic, 31 July 2008
Various editorials in The Word.
Letters to the Editor of The Irish Times, The Irish Independent, The Irish Catholic, The Times and the Frankfurter Allegemeine Zeitung.
'Hindu Zealots Wage War on Catholic India', Rite and Reason column, The Irish Times, 23 September 2008.
'Why Mission?' in The Word, October 2008.
'The Final Word' in Irish Daily Mail, 12 December 2008'Interview with Sarah Mac Donald' re the status of frozen embryos in The Universe, 22nd February 2009
'Der Papst im Kreuzfeur' in Die Tagespost, 21st March 2009.
'Response to the Ryan Report' in The Irish Catholic, 28th May 2009
'After Ryan': one of the most disturbing by-products is that Religious have been made scapegoats" in the Irish Independent, 19 June 2009
'Der Papst im Kreuzfeuer' in Die Tagespost, 21st March 2009
'The facts show church's policy on Aids is right' in The Irish Times, 25th March 2009
'The Ryan Report' in The Irish Catholic, 28 May 2009-09-23, an edited version was also printed in Inside the Vatican, June/July 2009, p. 28.
German Version, „Gedemütigt und bußfertig” in Die Tagespost, 13th June 2009
'The Church always pays for the sins of the past', Iirsh Examiner, 13th June 2009
“After Ryan, one of the more disturbing by-products is that Religious have been made scapegoats”, Irish Independent, 19 June 2009
German version, 'Gebot der Stunde: Nüchternheit', Die Tagespost, 25th June 2009
'Benedict XVI and the Second Vatican Council' in The Irish Catholic, 10th September 2009
Letter to the editor, Murphy Report, Irish Times
‘After Ryan, one of the more disturbing by-products is that Religious have been made scapegoats’, in the Irish Independent, 19 June 2009; reprinted as ‘Further reflections on the scandal’ in Inside the Vatican 17/7 (August/September 2009), 31;German version, ‘Gebot der Stunde: Nüchternheit’, Die Tagespost, 25 June 2009
‘Benedict XVI and the Second Vatican Council’ in The Irish Catholic, 10 September 2009
Contribution to the series “My favourite …” in Reality (September 2009)
Letter to the Editor of The Irish Catholic re Mission of the Church, 15 October 2009
Prime Time RTE on Catholic Education, 10 November 2009
Letters to the Editor of The Irish Times re the Murphy Report, 3 December 2009; 23 December 2009; 5 January 2010
“Time for the faithful to choose our own bishops” in The Irish Times, 9 December 2009: German translation: “Wo die Guten nichts tun, gedeiht das Böse” in Die Tagespost, 10 December 2009
TCD Debate, reported in The Irish Times, 17 February 2010
“Corruption is rife in politics because morality is banned” in The Irish Independent, 1 March 2010
“Recent Attacks on Pope not justified by evidence” in The Irish Times, 2 April 2010
“Despite media smears, world and faithful have warmed to Benedict” in The Irish Times, 19 April 2010
"Pope's perspective on condom ban": Letter to the Editor of The Irish Times, 24th November 2010
"Neue Sicht der sittlichen Wirklichkeit", an interview with Regina Einig in Die Tagespost, 25th November 2010
"Pope's views are lost in translation": Letter to the Editor of The Irish Independent, 26th November 2010
"Controversy over new missal" : Letter to the Editor of The Irish Times, 8th February 2011
"Writers and their time" : Letter to the Editor of The Tablet, 26th March 2011
"Wir wurden herausgefordert, die Wahrheit zu suchen" Michaela Koller im Gespraech mit Pater Vincent Twomey SVD, in PUR Magazine 6/11.
"Der Vatican hat sich nichts vorzuwerfen" interview with Oliver Maksan in Die Tagespost, 23 July 2011
"The Inviolability of the Seal of Confession": Pat Kenny Talk Show, Radio One, 19 July 2011.
"Taoiseach badly served by his speech writers" in The Irish Times, Opinion, 25 July 2011
"Pope Benedict meets with former pupils" in The Irish Catholic, 1 September 2011
"Das Gewissen unserer Zeit - Interview mit Markus Fraedrich, Katholische SonntagsZeitung, 24-25 September 2011.- an excerpt from the longer interview published in Http://steyler.de/svd/aktuelles/news/de/2011/PM 48 100816 Papst.php
"Folly of Closing Embassy to the Holy See" in The Irish Times, 10 November 2011
"Changed Missal has mass effect", in The Sunday Times, 4 December 2011.
"'I saw something dangerous was afoot'": Interview with Rory Fitzgerald, The Catholic Herald, 30 March 2012.
Interview with Mary Wilson, Morning Ireland, Radio One, 12 April 2012.
Letter to The Tablet ("Ireland's renewal"), 28 April 2012.
Prime Time programme, 3 May 2012.
"Resisting a Diocesan shake-up" in The Irish Catholic, 3 May 2012.
"The Second Vatican Council and the Irish Catholic Church" in The Irish Catholic, 11 October 2012.
"Fifty Years after it was met with euphoria, debate continues to surround Vatican II." in The Irish Time, 12 October 2012.
Letter to The Irish Catholic, 8 November 2012.
'Man of discipline with a warm heart and a wonderful memory' in the The Irish Independent, 12 February 2013.
'The Highlights of Benedict's Pontificate' in The Irish Catholic, 28 February 2013.
Written Submission to the Convention on the Constitution, 25 March 2013
"Why abortion bill is a prime example of moral wea kness", in The Irish Independent, 8 July 2013
"Conscience a last bulwark against totalitarism", Opinion piece in The Irish Times, 24 July 2013
"Irish abortion bill the result of 40 years of bad moral theology" , an interview with Hilary White, LifeSiteNews, July 29,2013
"Gewissen, Theologie und Demokratie", artricle in Die Tagespost, 6 August 2013
Interview with Deacon Nick Donnolly on a TD's ban as an Extraordinary Minister of the Eucharist after voting for the Abortion Bill, in www.lifesitenews 16 October 2013
"Pope Benedict XVI/Joseph Ratzinger On Politics": The Archbishop Gerety Lecture, Immaculate Conception Seminary School of Theology, Seton Hall University, 23 October 2013
"Conscience in Historical and Existential Context", Faculty Colloqium, ICS School of Theology, Seton Hall University, New Jersey, 3 December 2013.
"The Reopening of the Irish Embassy to the Holy See", panel discussion on Prime Time, RTE One, 21 January 2014
"How God works in the world - the principle of mediation" and "Joseph Ratzinger's Theology of the Eucharist" : lectures at the Theological Study Days, March 10-12, 2014, Jordan University College, Morogoro, Tanzania
"Conscience, Truth and the Human Person", paper read to the Ratzinger Symposium 2014: The Christian Vision of Humanity, held a the Divine Word Missionaries, Maynooth, Co Kildlare, Ireland, 12 April 2014.
Discussion on the resignation of Pope Benedcit XVI: Tonight with Vincent Brown, TV3, 23 April 2014
"What twisted morality led to misery of Tuam home?" in The Irish Times, 19 June 2014
Discussion on the Tuam scandal, Tonight with Tom McGurk, TV3, 17 July 2014
"Choosing a judge to chair the mother-and-baby home inquiry raises expectation of criminal findings" , The Irish Times, 29 July 2014,
"Interview given to Edward Pentin on the Schuelerkreis Meeting in Rome, 24 August 2014, published in New Catholic Register, 29 August 2014.
"Science and Religion", Letter to the Editor of The Irish Times, 29 September 2014
"An Extraordinary Synod - In More Ways Than One" in The Catholic Word Report, 15 October 2015
"Eine ausserordentliche Synode" in Die Tagespost, 18 October 2014, 9.
"Synod feels secular agenda hostile to traditional family" in The Irish Times, 18 October 2015
"A Tale of Two Synods" in The Catholic Herald, 24 October 2015, reprinted in Position Papers, no. 481 (November 2014), 16-20
"Eine lehr- und ereignisreiches Pontifikat", Interview by Michaela Koller, Part 1, in Zenit, 16 April 2016
"Er steht fuer die Wahrheit mitten in einer Welt der Luege", Interview by Michaela Koller, Part 2, in Zenit, 17 April 2016
"Citizens intimidated to say Yes to same-sex marriage" in The Irish Times, 1 May 2016
"Between Two Synods - Testing the Catholicity of Our Faith" in The Catholic World Report, 1 May 2016
"Zeit zur Wahrheitssuche: Die Synode, das theologische Durcheinander in Europe und die Aufgabe, die Lehre der Kirche ueber Ehe und Familie wieder zu entdecken" in Die Tagespost, 16 May 2016, 6-7."
"Sentiment triumphed reason in marriage referendum" in The Irish Times, 15 June 2015
"175 Years, 50 Great Catholics: Vincent Twomey on Benedict XVI, in The Tablet, 25 July 2015
"A Report from Ratzinger's Schuelerkreistreffen in Castel Gandolfo 2015" in The Catholic World Report, 2 September 2015
"The synod's script is atrocious" in The Catholic Herald, 25 September 2015"
"Celebration - the Key to the Renewal of Irish Catholicism?" in Position Papers, 500, June-July 2016, 28-33.