About Harrison Perkins

Harrison Perkins (PhD, Queen’s University Belfast; MDiv, Westminster Seminary California) is pastor of Oakland Hills Community Church (OPC), a member of the of the Heidelberg Reformation Association, a Senior Research Fellow at the Craig Center for the Study of the Westminster Standards, associate online instructor in church history at Westminster Theological Seminary, a visiting lecturer in systematic theology at Edinburgh Theological Seminary, and author of Reformed Covenant Theology: A Systematic Introduction. Meet all the Heidelberg contributors»

What Is Missio Dei?

What is God doing in creation? What is He aiming to achieve? The answer shapes how we think about what the world needs, what the church’s purpose is, and what it means for Christians to live on mission. The answer also has . . . Continue reading →

OPC General Assembly 2025

opc 2014 logo

It is convocation season again! Each summer, Reformed denominations have their national gatherings to weigh, deliberate, and even celebrate various issues going on throughout the churches. The Orthodox Presbyterian Church’s General Assembly met June 4–10 at Trinity Christian College just outside Chicago. . . . Continue reading →

The Sweetness of Psalm Singing

Our first point initially then helps us see the rich blessing of corporate worship. This spirit-fullness requires the church and is not an individualistic experience. This singing is addressing one another, namely other people. The style of worship where you blend into a . . . Continue reading →

The Cradle Of Christian Truth: Apostles’ Creed (Part 13)—From there he will come to judge the living and the dead

Casablanca is one of the most famous movies in cinematic history, leaving us with more than its fair share of artifacts ingrained in cultural memory even eighty years later. Humphrey Bogart alone left us with a stack of lines most of us . . . Continue reading →

It Was Christ All Along

The final layer is that Christ is the substance of the covenant of grace since He was always its Mediator….  Moreover, the New Testament explicitly designates Christ as the Savior who was active in the Old Testament. Harrison Perkins | Reformed Covenant . . . Continue reading →

The Cradle Of Christian Truth: Apostles’ Creed (Part 12)—He Ascended into Heaven and is Seated at the Right Hand of God the Father Almighty

It is a common bug of humanity that we do not like saying goodbye. We even have stock phrases like, “I’m bad at goodbyes,” or, “Let’s say ‘see you later’ rather than ‘goodbye.’” Even “Absence makes the heart grow fonder,” as true . . . Continue reading →