Grounded in scripture, built from research, tested in practice.

n 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.

THE PROBLEM IT WAS BUILT TO SOLVE

"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 Greatest Commandment Model™ grew out of Jen's graduate research in positive psychology and Christian formation. It introduces a lens we call covenantal wellbeing: a way of flourishing that is rooted in a personal, covenant relationship with God. The Model is 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.

Jen Collier holds an MSc in Applied Positive Psychology and Coaching Psychology from the University of East London. She is also 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. 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.