Research brief
Prayer and the Global Mission of God
What the Evidence Supports, and What It Does Not
Conviction
Scripture places prayer inside the church’s calling, discernment, sending, and support.
Confidence
Organized prayer repeatedly appears before or alongside major missionary advances.
Humility
No study isolates prayer as a separable cause of mission outcomes.
How much can we really say?
Prayer and mission are bound together in Scripture. The historical record shows a recurring sequence in which organized prayer precedes or accompanies missionary action. The record does not prove that prayer caused those advances independently of preaching, planning, giving, politics, travel, and sacrifice.
What holds up well
Jesus asks for workers, Antioch prays and sends, and Paul asks churches for prayer. Three Protestant anchor cases show organized prayer near the front of missionary movements, and a global study of church-planting movements found prayer in every successful movement examined.
Where the claims weaken
The Moravian “unbroken hundred years” is retrospective, Haystack details rest on late recollection, and current growth claims from China and Iran do not measure prayer. The evidence is strongest as theology and historical pattern.
“The honest position is conviction on theological grounds, confidence on historical pattern, and humility on causation.”
The governing thesis of this brief
No claim in the evidence matrix rises above 3 on a five-point scale. That reflects the design of the available research, not a verdict on the value of prayer. Churches have rarely collected the longitudinal data needed to test prayer alongside sending, giving, retention, and multiplication.
The praying church is the sent church
God is the sender in mission, and God’s people take part in it. Prayer is where those two convictions meet.
Jesus tells his disciples to ask the Lord of the harvest to send workers; the next chapter sends those same disciples (Matthew 9:35–38; 10:1). At Antioch, leaders worship, fast, hear, pray, and send Barnabas and Saul (Acts 13:1–4). Paul asks churches to pray for open doors, clarity, boldness, safety, and the spread of the word (Romans 15:30–32; Ephesians 6:18–20; Colossians 4:2–4; 2 Thessalonians 3:1–2).
Prayer appears as preparation, participation, discernment, dependence, spiritual conflict, perseverance, and intercession for rulers and peoples. Proclamation remains distinct. Prayer prepares and supports proclamation; it does not replace it.
Prayer as participation
The most careful theological formulation is that prayer is one of the God-ordained means through which people participate in God’s purposes. This protects against treating prayer as a lever, and it also resists reducing prayer to private spiritual exercise. The result is a church that asks, listens, acts, and remains accountable for the practical care of those it sends.
Three cases, with the caveats left in
The sequence is visible. Its interpretation still requires care.
Herrnhut and the Moravian watch
On 26 August, twenty-four men and twenty-four women covenanted to pray in hourly shifts; the practice began the next day and grew. The first overseas missionaries left in 1732. The Moravian Church says the watch continued in its congregations for “roughly 100 years.”
Caveat. The watch was founded to preserve the blessing of the community’s revival, rather than to launch missions. “Unbroken, 24/7 for 100 years” traces to Leslie Tarr’s 1977 inference, later abridged in 1982, with no primary source for continuous coverage.
The Prayer Call and the Baptist Missionary Society
In June 1784, a circle of English Baptist pastors adopted monthly prayer after John Erskine mailed Jonathan Edwards’s An Humble Attempt to John Ryland Jr. The same network formed the Baptist Missionary Society in October 1792; William Carey sailed in 1793.
Caveat. The call initially focused on revival, while its circular also prayed for the gospel’s spread to distant places. The exact 2–3 June dates cannot be confirmed. The often-cited Payne 1943 title is incorrect and has been retired.
Haystack and the American Board
Williams College students who were already meeting for prayer discussed the spiritual needs of Asia. The Brethren formed in 1808, the American Board in 1810, and its first missionaries were ordained and sailed in 1812.
Caveat. The meeting’s year is disputed: 1806, 1807, and 1808 all appear in the sources. Byram Green wrote his recollection about fifty years later. “We can do this if we will” has no primary source, and the story that Carey’s Enquiry was under the haystack is embellishment.
A field rich in testimony, thin in causal research
Ratings assess the evidence for prayer’s measurable contribution, not the spiritual importance of the claim. Five would mean very strong evidence; one means anecdotal or speculative evidence.
Current evidence notes
The gap between testimony and proof
The giving gap
No published evidence was found that crosses prayer frequency with giving to missions. This is an absence of evidence, not a study showing no effect. Claims that “prayer increases giving” remain plausible and untested.
Causation limits
Prayer appears alongside preaching, planning, pastoral leadership, travel access, economic change, and sacrifice. Historical sequence and participant testimony cannot isolate its effect. China and Iran growth claims are especially unsuitable for causal claims because counts are disputed and prayer was not measured.
What to avoid saying
A seven-stage missionary rhythm
The stages translate the biblical pattern and the historical cases into a church practice. Each stage includes a measure so local experience can become usable evidence.
PRAY
Establish a visible rhythm for named peoples and workers. Measure: regular participants, named people groups, gathering frequency.
DISCERN
Pair prayer with research and make decisions in community. Measure: a written focus and the share of the mission budget aligned to it.
MOBILIZE
Give every member a concrete way to pray, give, welcome, or go. Measure: participation and adopted workers or peoples.
SEND
Commission with clear roles and shared responsibility. Measure: people sent and the share still serving after three years.
SUPPORT
Join specific prayer to health, finances, visits, and member care. Measure: contact frequency, requests logged, practical needs tracked.
GO
Prepare people for cross-cultural service and debrief their return. Measure: number going, length of service, re-entry follow-up.
MULTIPLY
Raise local leaders who can continue without outside dependence. Measure: new groups or churches and local leaders developed.
From baseline to review
Adjust the sequence to the church’s size and calendar. Keep month one and month twelve intact; the before-and-after record is the point.
Count current prayer participants, missionaries supported, and mission giving. Record the starting numbers.
Launch a monthly gathering, recruit a prayer team, and teach Matthew 9:35–38.
Name people groups and workers; add a short weekly mission prayer in worship.
Pray, research, and hold an open listening meeting. Write a focus statement.
Preach on mission and offer an entry-level course or small-group study.
Give each member a place to participate; let groups adopt a worker or people.
Meet with those exploring a call, together with pastors and the prayer team.
Pray over those going, with agreed responsibilities for church and workers.
Assign a prayer team and care contact; begin a quarterly request cycle.
Review health, finance, and communication needs. Identify and close gaps.
Visit a field partner or send a team; debrief and report what happened with dates.
Compare the new numbers with month one, record answered and unanswered prayer, and plan year two.
Where the brief is grounded
Sources are grouped by the kind of evidence they contribute. Organizational figures are treated as self-reported unless independently confirmed.
Primary and near-primary
- John Sutcliff, “The Prayer Call of 1784,” Northamptonshire Association circular letter (1784).
- Hudson Taylor’s flyleaf note of 25 June 1865, reproduced in A Retrospect.
- Moravian Church, Unity Prayer Watch materials and historical accounts.
- Williams College Special Collections, Haystack Prayer Meeting materials.
Research and scholarship
- Michael A. G. Haykin, work on Edwards, Sutcliff, and the 1784 Prayer Call (2014).
- David Garrison, Church Planting Movements (2004).
- William D. Taylor, ed., Too Valuable to Lose (1997); Rob Hay et al., eds., Worth Keeping (2007).
- Froese, Bonhag, Uecker et al., “Prayer and Mental Well-Being in the United States,” Journal of Religion and Health 63 (2024).
- “Religious coping, religious support, and psychological functioning among short-term missionaries,” Mental Health, Religion & Culture 12:7 (2009).
Data and surveys
- Pew Research Center, global prayer data (2024), spiritual practices in 35 countries (2025), and religion in China (2023).
- Center for the Study of Global Christianity, “Status of Global Christianity, 2026,” International Bulletin of Mission Research 50:1.
- LifeWay Research surveys on church planting (2010), persecuted Christians (2025), and pastors’ prayer lives (Ellison Research, 2005).
- GAMAAN, survey of religion in Iran (2020).
Claims requiring attribution
- Pete Greig / 24-7 Prayer figures are self-reported. Traveling Team’s 3.4% figure is an advocacy estimate.
- RCCG’s five-million figure is a 2006 church claim; independent scholarship gives a much lower range.
- IHOPKC’s October 2026 operating status comes from its live prayer-room schedule; broader organizational health is a separate question.
Pray because Scripture asks it. Keep honest records because the church deserves to know what happened.