Every now and then, someone asks a question that deserves more than just a quick reply in a message thread. That’s exactly what happened when Ark brought up something that many people, believers and skeptics alike, have wrestled with: Is prayer actually effective? Can prayer actually lead to things like verifiable, real-world healing? In other words, is there any solid evidence that prayer does more than offer emotional comfort or spiritual encouragement? Does it actually do something?
It’s a great question, and it gets right to the heart of a much bigger conversation. In a world like ours, people want to know: If God is real and prayer works, then shouldn’t we be able to see that in a way that holds up under scrutiny? That’s not just a fair question: it’s an important one. Because if prayer is merely psychological, then we’re talking about a coping mechanism. But if prayer has real power, then we’re talking about something far more profound: evidence of divine interaction in the physical world.
That’s why I decided to answer Ark’s question here, on the site, for anyone who’s curious about this topic. These kinds of questions challenge us to think deeply, not just about prayer, but about the kind of universe we live in. Is it closed off to the supernatural? Or is it possible that the God who created the natural order steps in and does what only He can do?
In the article that follows, I explore some of the best-documented cases, clinical studies, and personal experiences that suggest prayer has, in certain instances, resulted in healing that defies natural explanation, therefore proving it has effect. But more than that, I want to invite you into the conversation. Because while questions like this matter, I believe the answers (when we’re willing to explore them) can lead us not just to information, but to transformation.
Ark’s Question:
I notice you encourage people to pray.
This aspect of Christianity has always fascinated me.
Do you have any evidence to demonstrate a single verifiable incident where intercessory prayer has been effective?
My Answer
That is a fair and thoughtful question, and I appreciate your openness in exploring this issue. When many atheists ask for “verifiable” evidence, they often imply that the proof must fit entirely within a naturalistic framework, which is one that leaves no room for supernatural intervention. In practice, this means they demand evidence that can be conclusively proven by laboratory standards, excluding any possibility of divine influence. While this is an understandably cautious stance, it also establishes a very high and, at times, shifting standard of proof that may inadvertently dismiss events that defy conventional explanations. The closest example I have that you’re looking for is directly related to physical healing, so I will focus physical healing as the overarching topic in this response.
I believe there are documented cases that merit serious consideration because they occurred in direct response to prayer. One striking example is the evidence from the Lourdes Medical Bureau, an independent, physician-led board in Lourdes, France. At this place, which is also a renowned pilgrimage site, over 7,000 healing cases have been reported, and out of these, approximately 70 have been declared medically inexplicable after exhaustive clinical review. In each of these cases, formal prayer, whether through the collective prayer of pilgrims or through intercessory prayer on behalf of individuals, preceded healings that could not be attributed to any known natural cause. These include instances such as advanced multiple sclerosis entering complete and lasting remission, bone cancers disappearing, and congenital deformities healing suddenly without medical intervention. The fact that these recoveries occurred shortly after prayer and were thoroughly vetted by medical professionals, including skeptics, is a powerful indication that the healing was not coincidental but is reasonably attributable to the prayer itself.
In addition to these documented cases, there is also supportive evidence from clinical studies that have specifically investigated the effects of intercessory prayer. For example, the 1988 study by Byrd reported that patients in a coronary care unit, who received intercessory prayer, experienced improved health outcomes compared to those who did not. Similarly, the STEP trial by Benson and colleagues examined patients undergoing cardiac surgery and found measurable differences associated with prayer interventions, even though the methodology of such studies continues to provoke debate. These investigations were designed to evaluate healing as a result of prayer, and while the interpretation of the findings is not without its challenges, they offer important, peer-reviewed evidence that events traditionally labeled as “miraculous” do indeed occur following prayer.
My own personal experiences further underscore these documented reports. I have witnessed, with my own eyes, people experience remarkable recoveries in direct correlation with prayer. I have seen a man with a torn rotator cuff immediately raise his arm and perform physical tasks after fervent prayer, which is a result that astonished even his attending physicians. I have observed tumors shrink and mysterious recoveries that occurred in the presence of prayerful intervention. These experiences, when coupled with the rigorously documented cases and clinical studies, form a cohesive argument that the healing power of prayer is not merely coincidental but is, in many instances, the direct result of prayer.
Miracles, by their very nature, defy conventional understanding because they occur exactly when divine intervention is at work. If one’s standard for evidence mandates that every phenomenon must be measurable under strictly naturalistic conditions, then by definition, the possibility of the supernatural is being precluded. The cumulative evidence from the extensive records at Lourdes and the rigorous clinical studies to firsthand testimony, suggests that when intercession takes place, healing outcomes occur that would otherwise remain inexplicable. In other words, these events took place as a direct result of prayer, which challenges us to rethink the evaluative framework employed for this class of events, and to recognize that the divine can indeed work beyond the limits of our current scientific understanding.
So, rather than asking whether prayer works only if it can be confined within naturalistic limits, it is more productive to consider the substantial body of evidence that indicates prayer has effected real, measurable changes in health. This evidence invites us to open our minds and acknowledge that when the supernatural is at work, strict laboratory conditions may not fully capture the mystery of divine intervention. Ark, this may not be an acceptable answer to you, especially if you come from a naturalistic framework. For a naturalist, if phenomena like this cannot be explained naturalistically, all other conclusions are rejected. However, I do not operate from that framework, and I think there are good reasons to reject it. If you accept my reasoning and the evidence I have offered, I have proven to you that prayer is indeed effective.
With that said, thank you so much for engaging me with this question. I thoroughly enjoyed taking the time to write this out for you.
Adam Parker, Host of the Bold Apologia Podcast
“Proclaiming Christ to listeners through apologetics, theology, and the proclamation of the Word of God.”
Conclusion
Thank you to whomever has taken the time to read through this. Though it is highly possible that Ark and I will come to completely different conclusions on this, my hope is that for the average reader, I have answered this question in a convincing and successful way. As I said, for a naturalist, this may never be an appropriate answer because their presuppositions do not allow for it. Therefore, in order to have a naturalist see this topic from my perspective, I would have to explain why naturalism, as a framework, falls short. Since that is not the topic of the article, I won’t go any further except to say this: Naturalism is a worldview that leaves more questions than answers, and many of the answers it does offer are vastly inadequate. In any case, based on reviewed research and my own personal experience I am convinced that prayer is effective. I am further convinced that what Jesus says holds true: “In my name. . . they will lay their hands on the sick, and they will get well. . .” (Mark 16:18). Again, thank you for reading this article, and may God richly bless you!
Bibliography
- Byrd, R. B. (1988). Positive therapeutic effects of intercessory prayer in a coronary care unit population. Southern Medical Journal, 81(7), 826–829. This study, authored by Robert B. Byrd, was published in 1988 and is one of the earliest reports indicating that patients in a coronary care unit who were unknowingly prayed for experienced improved clinical outcomes. DOI 10.1097/00007611-198807000-00010
- Benson, H., Dusek, J. A., Sherwood, J. B., Lam, P., Bethea, C. F., Carpenter, W., … & Hibberd, P. L. (2006). Study of the Therapeutic Effects of Intercessory Prayer (STEP) in cardiac bypass patients: A multicenter randomized trial of uncertainty and certainty of receiving intercessory prayer. American Heart Journal, 151(4), 934–942. Known as the STEP trial, this multicenter randomized trial is a cornerstone study in the field of intercessory prayer research. DOI 10.1016/j.ahj.2005.05.028
- Lourdes Medical Bureau. (n.d.). Healed Cases The Lourdes Medical Bureau is an independent, physician-led board responsible for reviewing healing claims at Lourdes, France. The webpage cited is the official Lourdes site documenting cases that have been declared medically inexplicable after rigorous review.
- Koenig, H. G., McCullough, M. E., & Larson, D. B. (2001). Handbook of Religion and Health (2nd ed.). New York, NY: Oxford University Press. This authoritative handbook provides a comprehensive examination of the relationship between religious practices, including intercessory prayer, and health outcomes. 2001 by Oxford University Press and the ISBN 978-0195143607
- Koenig, H. G. (2012). Religion, spirituality, and health: The research and clinical implications. ISRN Psychiatry, 2012, Article ID 278730, 1–33. doi:10.5402/2012/278730 This review article by Koenig offers an in-depth discussion of research on the influence of religion and spirituality (including prayer) on health.
- Masters, K. S., & Spielmans, G. I. (2007). Prayer and health: A review, meta-analysis, and methodological critique. Journal of Behavioral Medicine, 30(4), 329–338. doi:10.1007/s10865-007-9090-1 This meta-analysis critically evaluates a range of studies on prayer and health outcomes and has been confirmed for accuracy.



