John Mark Eager, Director of the Mailbox Club, Children Missions Gospel Financial Finish Line Podcast
Finish Line Podcast Episode 30

John Mark Eager, Director of the Mailbox Club, on Why Children are the Largest Unreached People Group

You may want your giving to advance the gospel for generations, yet still wonder where resources can make the greatest long-term difference among people who are especially open to faith.

What could change if more Christian generosity focused on reaching and discipling children while equipping local believers to continue that work in their own communities?


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Meet your guide

John Mark Eager, Executive Director of The Mailbox Club, leads a global children’s evangelism and discipleship ministry founded by his parents in 1965. After training as a civil engineer, a mission trip to communist Poland reshaped his priorities and eventually brought him into the ministry, where he has helped expand its reach through churches, indigenous leaders, volunteers, and partnerships around the world.

The Mailbox Club equips local believers with systematic Bible lessons designed to introduce children to the gospel and continue into long-term discipleship. John Mark explains why local ownership matters, how hundreds of thousands of volunteers make large-scale ministry possible, and why partnerships with established evangelism ministries allow The Mailbox Club to focus on sustained spiritual formation after initial outreach. He also describes opportunities in places ranging from Sub-Saharan Africa and India to restricted and refugee communities.

By the end, you may see children not simply as future participants in the church, but as a significant mission field today whose discipleship can influence families, communities, and generations.

What you’ll gain

  • Why children may be an overlooked global mission field
  • How local ownership can multiply discipleship across entire nations
  • Why evangelism needs long-term discipleship to produce lasting fruit
  • How volunteers dramatically increase the impact of ministry resources
  • Why strategic partnerships can extend your giving beyond one organization
  • How discipled children can influence families and future generations

Inspired? Take your next step

Try the Game of Life Simulator

Step into a four-minute interactive experience and see what unfolds as you decide how to manage your resources.

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Inspired? Learn how to partner with ministries well.

A compelling ministry story can inspire you to respond. But wise partnership often begins with better questions.

Applied Generosity Intervention Partnership Focus

What is the ministry really seeking to restore?

Learn to look beyond visible needs toward people, context, relationships, and flourishing.

Applied Generosity Intervention Partnership Fruitfulness

How do you recognize meaningful impact?

Consider how ministries learn, evaluate their work, and pursue lasting change.

Applied Generosity Intervention Partnership Faithfulness

What does genuine ministry partnership look like?

Explore how to foster trust, alignment, and shared mission in your giving.

In our Intervention Series on the Applied Generosity Podcast, we’ll help you become a more thoughtful, discerning, and faithful partner.

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Quotes to Remember

  • “And I realized … I could make a million dollars, so what? What does it matter?” 
  • “The approach we take is to equip believers around the world – churches and believers – to evangelize and disciple children.”
  • “It literally is like the feeding of the 5000. If you take Jesus out of the story, there’s just no way.”
  • “Children are the greatest harvest field in the world. And they are the most responsive to the gospel.
  • “Adults become proud from success, or bitter from hardships they’ve faced. So it’s very difficult for a lot of adults to bend a knee and become like a child to receive Christ.”
  • “Children are the most unreached people group in the world.”
  • “Children, if won to Christ and properly discipled, can lead long, fruitful lives for Christ.”
  • “It looks different in various countries because it’s indigenous – it’s gone viral, it’s organic, which is beautiful.”
  • “We love to come in behind an organization that has a big evangelism presence and partner with them to provide long term discipleship.”
  • “We cannot name anything we have that has not been given to us by God.”

Links from the Show

Bible References from the Show

Luke 18:16-17 | Let the Children Come to Me 

16 But Jesus called them to him, saying, “Let the children come to me, and do not hinder them, for to such belongs the kingdom of God. 17 Truly, I say to you, whoever does not receive the kingdom of God like a child shall not enter it.”

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Have you considered the ways you are uniquely called into generosity? We’re not all called into the same adventure.
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Enter your information below and we’ll send you our free PDF guide to explore the specific adventure you were called into.
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