Ministry is war.
But the battlefield isn’t where most church leaders think it is.
We blame difficult team members. We blame lack of resources. We blame cultural resistance, declining religious affiliation, and the increasing secularization of our communities. But as Paul Tripp recently reminded us, “The real war is not out there. The real war is in here”—in the depths of our own hearts, where the kingdom of self wages relentless war against the kingdom of God.
This truth has profound implications for how we make disciples, develop leaders, and plant churches. Because here’s what we’ve learned the hard way: You cannot lead others to a place you have not been yourself. You cannot multiply what you have not first become.
The Crisis in Contemporary Discipleship
Recent data tells a sobering story. Nearly 4 in 10 young adults claimed no religious affiliation in 2023. Many raised in Christian homes disengage from the faith before age 30. Churches invest millions in youth programs, worship production, and facilities—yet the exodus continues.
What’s missing? We’re producing volunteers who can run programs, but we’re failing to produce disciples who have conquered the kingdom of self. We’re teaching young people to serve the church, but we’re not helping them wage the war that rages in their own hearts.
As Fabs Harford notes in his work on whole-person discipleship, many churches practice “Management-Style Discipleship”—reducing people to thoughts, feelings, OR actions based on the discipler’s strength. The result? Behavior modification without heart transformation. Theological knowledge without worship. Emotional experiences without obedience. “The demons think rightly,” Harford warns, “evidencing that right thoughts about God don’t equal worship.”
True discipleship must engage the whole person—thoughts, feelings, AND actions—because the war within is fought on every front.
The Internal War Every Leader Must Face
Jesus was explicit about this: “For where your treasure is, there your heart will be also” (Matthew 6:21). The kingdom of self is built on personal desires, earthly ambitions, and the relentless pursuit of human approval. The kingdom of God is built on submission to Christ’s lordship, eternal purposes, and the pursuit of God’s glory above all else.
These two kingdoms cannot coexist in the same heart. And here’s what makes this war so dangerous: It is possible to build a successful ministry while losing the war within. You can grow a church, write books, speak at conferences, and accumulate followers—all while your heart treasures earthly success more than Christ himself.
John Calvin, in his Institutes of the Christian Religion, understood this battle intimately. “The human heart is a perpetual factory of idols,” he wrote. “Every one of us is, from his mother’s womb, expert in inventing idols.” The church leader who has not confronted the idol factory of his own heart will inevitably lead others toward his own idols—whether those idols are numeric growth, doctrinal precision, social respectability, or personal comfort.
From Self to Multiplication: The Charles Simeon Model
Charles Simeon (1759–1836), the influential pastor of Holy Trinity Church in Cambridge, understood that the war within must be won before leadership can be multiplied. Simeon didn’t just preach to his congregation—he invested his life in mentoring young men, meeting with them regularly to discuss preaching, theology, and pastoral ministry.
But here’s what made Simeon’s mentorship transformative: He discipled from a place of authentic brokenness. Having experienced profound spiritual struggles and opposition early in his ministry, Simeon knew the war within. He didn’t mentor from a pedestal of self-righteous performance. He mentored from the trenches of his own ongoing battle against the kingdom of self.
The result? A remarkable legacy of multiplied leaders. Many of Simeon’s mentees became influential church leaders, missionaries, and preachers who carried his gospel-centered vision forward. Simeon understood what too many contemporary leaders miss: Effective churches don’t just preach to the congregation—they intentionally invest in raising up new leaders through personal mentorship.
Simeon’s approach aligns perfectly with Paul’s instruction to Timothy: “And the things you have heard me say in the presence of many witnesses entrust to faithful people who will be able to teach others also” (2 Timothy 2:2). This is the multiplication pattern: Paul → Timothy → faithful people → others also. Four generations of discipleship, built on leaders who have first won the war within.
Whole-Person Discipleship as Spiritual Warfare
Contemporary discipleship often fails because it addresses only symptoms, not the root disease. We teach people to change their behavior without addressing the treasure-hungry hearts that drive that behavior. We give them theological knowledge without helping them love the God they now know. We offer emotional experiences without calling them to the costly obedience of discipleship.
Whole-person discipleship recognizes that humans are complex creatures. We are not merely souls trapped in bodies, nor are we merely intellects processing information. We are embodied beings with thoughts, feelings, and actions—and all three must be engaged for genuine transformation.
Jonathan Edwards, in his Religious Affections, argued that true religion consists “very much in the affections.” But he also insisted that genuine affections are accompanied by holy practice. “For as the body without the spirit is dead, so faith without works is dead also” (James 2:26).
This is why the war within is the foundation for all external ministry. Until a leader has confronted the kingdom of self in his own heart, he cannot effectively disciple others to do the same. Until a church planter has surrendered his ambitions to Christ’s lordship, he will build his own kingdom rather than God’s. Until a mentor has experienced the brokenness of authentic repentance, he will produce Pharisees rather than disciples.
Practical Applications for Leaders and Church Planters
So how do we wage this war? How do we build discipleship and leadership development systems that address the kingdom of self?
1. Model Authentic Brokenness
Charles Simeon’s example challenges us to examine whether we are merely performing ministry or multiplying ourselves through authentic mentorship. Your disciples need to see you wrestling with the war within. They need to know that you haven’t arrived, that you’re still fighting, that you still need grace.
2. Disciple the Whole Person
Don’t reduce people to their intellect, their emotions, or their behavior. Ask questions that engage all three: What are you learning about God? How does that affect your heart? What will you do to obey? This three-fold approach mirrors the structure of Discovery Bible Studies that are sparking Disciple Making Movements globally.
3. Prioritize Intergenerational Relationships
Research shows that effective faith transmission happens through life-on-life relationships across generations. Kyle Bjerga notes that “most believers cannot tell their testimony without naming older people who shared the gospel with them.” Yet many churches segregate by age, missing the opportunity for younger believers to learn from older saints who have weathered the storms of the war within.
4. Create Space for the Hard Questions
Young adults in particular need permission to wrestle with doubt, to ask uncomfortable questions, and to struggle openly. Churches that reach the next generation don’t offer pat answers—they create safe spaces where the war within can be named, confessed, and fought in community.
The Promise for Those Who Fight
Here’s the good news: Jesus has already won the decisive victory. The war within is real, but it is not hopeless. “For sin shall no longer be your master, because you are not under the law, but under grace” (Romans 6:14).
When we lead from a place of brokenness rather than self-righteous performance, we demonstrate the power of the gospel we proclaim. When we admit our ongoing struggles with the kingdom of self, we make space for others to be honest about theirs. When we treasure Christ above all else, we show our disciples what true treasure looks like.
And as we wage this war within, we become equipped to multiply disciples who will do the same. The church that learns to fight this battle will not merely grow—it will multiply. It will not merely produce volunteers—it will produce disciple-makers. It will not merely plant churches—it will plant churches led by leaders who have conquered the kingdom of self.
Ministry is war. Fight it first in your own heart. Then go forth and multiply.