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9 October is the Feast of St John Henry Newman (1801–1890), one of the most influential Christian thinkers of the nineteenth century. His writings explored faith, reason, truth and conscience, and continue to influence Christian thought today.
It is his understanding of conscience that interests me, particularly because it raises an important question for Christian unity. If we believe conscience is so important in our own moral and religious lives, are we equally prepared to respect its authority in the lives of Christians with whom we disagree?
For Newman, conscience was not simply a matter of personal preference, nor was it permission to decide for ourselves what was right and wrong. He understood it as an awareness of moral obligation, something that calls us beyond our own desires and interests towards the truth. In his Letter to the Duke of Norfolk (1875), he described conscience as the “aboriginal Vicar of Christ”.
Importantly, however, Newman was clear that conscience could be mistaken. It needed to be formed through reflection, experience, prayer and an honest search for truth. Conscience was not infallible, but neither could its demands simply be dismissed because they were inconvenient or challenged established authority.
Newman’s understanding of conscience anticipated important developments in the Second Vatican Council’s Declaration on Religious Freedom, Dignitatis Humanae (1965). Although a Catholic document, its central concern reaches well beyond the Catholic Church. The Council affirmed that every person has a right to religious freedom, grounded in human dignity, and that no one should be coerced into acting against their conscience in religious matters. It also insisted that everyone has a duty to seek truth.
These two principles belong together. We cannot claim to respect another person’s search for religious truth while denying them the freedom to pursue it, even when their conclusions differ from our own.
For Christians seeking unity, I believe this has important and obvious implications. We may disagree about the nature of the Church, the sacraments, ministry or authority, and these differences cannot simply be wished away. Equally, we should recognise that Christians whose beliefs differ from our own may have reached their conclusions through serious reflection, prayer and a sincere desire to be faithful to Christ.
Respecting their conscience does not require us to abandon our convictions or accept theirs as true. It does require us to recognise their moral responsibility to follow conscience, just as we expect them to respect ours. Genuine ecumenical dialogue depends upon that mutual recognition. The Council’s Dignitatis Humanae (§3) offers a helpful reminder here that the search for truth should involve teaching, communication and dialogue, through which people share what they have discovered, or believe they have discovered, so that they may assist one another.
This seems to me a valuable description of what ecumenical encounter should aspire to be. We come together not because truth is unimportant, but precisely because it matters. We listen because we recognise that our understanding may be incomplete, and because another Christian’s experience and reflection may help us see something we have overlooked.
On his feast day, Newman leaves us with a challenge as relevant to Christian unity as it is to our personal lives. We rightly expect others to respect our conscience and the convictions that flow from it. Are we prepared to extend that same respect to those whose conscientious search for Christian truth has led them somewhere different?
Christian unity cannot be built upon indifference to truth. However, neither can it grow without respect for the conscience of those with whom we disagree. If we are serious about seeking unity, that respect is not an optional courtesy. It is part of what makes genuine encounter possible.
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