OUR FOUNDATION
Grounded in scripture, built from research, tested in practice.
Why this framework exists, where it came from, and who developed it.
THE PROBLEM IT WAS BUILT TO SOLVE
In nearly two decades of Christian ministry and professional coaching, Jen Collier kept encountering the same tension. The tools and frameworks of positive psychology were genuinely useful. But for many Christian clients, they did not quite fit. The vocabulary was off. The assumptions were different. And the most pressing questions her clients brought were not being answered by existing models.
"I know I'm supposed to praise God and grieve simultaneously — but HOW do I do that?"
— A.W.But the deeper issue is often not what it appears to be. Many Christians are not consciously framing their struggles as faith problems at all. They have simply learned to keep their inner life and their faith life in separate compartments, the way many of us were taught to function. Work is work. Church is church. Emotions are personal. And God, somewhere in the background, is presumably aware of all of it. The result is that people are trying to thrive in pieces, without a framework that holds everything together and shows them how faith actually connects to the daily experience of being human.
That gap is not being filled at church, at home, or in the endless stream of Christian content online. Not because those spaces are failing, but because helping someone actually walk out their faith in practical, embodied, day-to-day ways requires something more than inspiration or instruction. It requires a framework. And for most Christians, that framework has not existed.
THE RESEARCH
To address this gap, Jen conducted a directed qualitative content analysis of Christian Psychology literature as part of her MSc in Applied Positive Psychology and Coaching Psychology at the University of East London. The goal was systematic: identify the well-being constructs that actually appear in Christian Psychology scholarship, map them against an established positive psychology framework, and see what emerged.
The analysis drew on peer-reviewed literature spanning nearly three decades, coding constructs deductively against the Hierarchical Framework of Well-being (Disabato et al., 2025) and inductively for anything the existing framework could not contain. What emerged was significant. While many Christian Psychology constructs mapped cleanly onto positive psychology categories, a substantial cluster did not. These constructs shared something in common: they were predicated on a personal, covenantal relationship with God. They could not be reduced to spirituality or religiosity without losing their meaning.
This finding produced a new lens, covenantal well-being, and ultimately the Greatest Commandment Model™, organized around the relational structure of Luke 10:27-28: loving God with the whole person, loving yourself as an image-bearer, and loving others as an outward expression of that love received.
WHO DEVELOPED IT
Jen Collier is an NBC-HWC certified health and well-being coach with a BA in Psychology and a focus in Religious Studies, and nearly two decades of experience in Christian ministry and coaching. She completed her MSc in Applied Positive Psychology and Coaching Psychology at the University of East London in May 2026 and is awaiting formal results. Her work sits at the intersection of applied positive psychology and the Christian life, practically and not just theoretically.
Her husband and co-founder, Justin Collier, brings decades of ministry experience, including service as an ordained elder, alongside professional business leadership. Together, they founded the Luke 10:28 Center for Christian Flourishing to move this work from research into practice.
Jennifer Collier
NBC-HWC certified health and well-being coach. BA Psychology with a focus in Religious Studies. Nearly two decades of experience in Christian ministry and coaching. MSc Applied Positive Psychology and Coaching Psychology candidate, University of East London.
MAPP-CP · NBC-HWC · CAPS · AACC · ICF
WHERE IT STANDS NOW
The Greatest Commandment Model™ is currently in active use. Jen applies its constructs directly in her coaching practice, and early pathway interventions built from the model are in beta testing with consistently positive results from clients navigating the practical how of faithful living.
This is early-stage work, and we say that honestly. The model has a rigorous conceptual foundation and a coherent theological grounding, and it is resonating with the people it was built for. Empirical validation through formal study is a next step we are actively planning. Alongside that, we are committed to continuously updating the model as new research emerges and to building practical interventions that practitioners and everyday believers can access and use to grow closer to God, to themselves, and to the people around them.
Current status: MSc dissertation under review. Beta testing of assessment pathways underway. The center is preparing for formal launch of the Greatest Commandment Assessment.
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