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A Theological Jack-of-all-Trades

There are several ways a baseball player can carve out a successful career for himself. He could try being the best player at one position or the best at one aspect of the game, like hitting. Often, the five best hitters of any given decade are destined for Cooperstown. There is, though, a less glamorous way to stay in the league. He could also try being really good at numerous positions and many facets of the game. The ability to play multiple positions, hit, and run the bases is an incredible asset to a team, and a player can find himself in a long, successful career by being a jack-of-all-trades.

For those who find themselves at the intersection of the sports fan/Reformed theology Venn Diagram, the comparison between Petrus van Mastricht’s Theoretical-Practical Theology and an all-around baseball player is (surprisingly) apt. Mastricht’s magnum opus, first written in Latin and translated into his native Dutch, is finally receiving an English translation, planned at over four thousand pages and seven volumes. The latest publication in this series, Volume III, covers two books: Book 3, The Works of God, and Book 4, The Fall of Man, and showcases how Mastricht was a theological jack-of-all-trades. He combines theological precision with doxological reflection ­– polemical concern with exegetical care in a way unique among the Reformed Scholastics. He is like the ballplayer who is really good at fielding, hitting, and baserunning.

Biography and Summary

Petrus van Mastricht (1630-1706) was a Dutch pastor and theologian. He received his initial theological training from Johannes Hoornbeeck (1617-1666) and Gisbertus Voetius (1589-1676) at Utrecht University. While pastoring, Mastricht completed his master of arts and doctor of theology degrees at the University of Duisberg in 1669, subsequently accepting the position of professor of Hebrew and theology at the university in 1670. In 1677, Mastricht succeeded Voetius as professor of Hebrew and theology at Utrecht University, a position he held until his death in 1706.Mastricht is like the ballplayer who is really good at fielding, hitting, and baserunning. Click To Tweet

A typical chapter in Theoretical-Practical Theology follows a scholastic organization. After a brief introduction to the subject, Mastricht begins his “Exegetical Part,” where he carefully examines Scripture’s teaching on the subject. In these sections, Mastricht’s knowledge of the original languages and canonical connectedness of the text is on full display. Then, he moves to the “Dogmatic Part.” Here, Mastricht considers various theological discussions surrounding the subject. Next, Mastricht turns to the “Elenctic Part,” or his “polemic” section. This section contains specific polemical questions that Mastricht considers contra his contemporary opponents. For example, in his chapter on Creation in General, he considers the question, “Could a creature be an instrument of creation,” in which he argues against both Jews and Socinians that Christ could not have been a mere creature if he is attributed as Creator. Each chapter concludes with a “Practical Part,” where he provides applications for the doctrine under consideration. This section often reads like the conclusion of a sermon, calling the reader to respond in light of the discussed subject.

Volume 3 of Theoretical-Practical Theology covers the works of God and the fall of man. The volume begins with Book 3 and considers God’s actions and decrees before moving on to predestination, election, and reprobation. Then, Mastricht considers creation, the contents of the six days of creation, God’s ongoing relationship with creation, the creation of angelic beings, and the creation of man in God’s image. Book 4 then examines man’s apostasy. It begins by considering how man violated the covenant of nature (or the covenant of works). The volume concludes with Mastricht’s explanation of the doctrine of sin – including original sin, the nature of sin, and the punishment for sin.


Jonathan Edwards’ provocative assessment of Theoretical-Practical Theology adorns the volume’s back cover. While noting Francis Turretin’s (1623-1687) prowess at polemics, Edwards commends Mastricht as the overall superior work. Edwards concludes that Mastricht is better than any other book in the world except the Bible! While provocative, Edwards’ opinion is well-received because Theoretical-Practical Theology is truly a tour de force in systematic theology, and readers are sure to gain many benefits from reading it.Jonathan Edwards concludes that Mastricht is better than any other book in the world except the Bible! Click To Tweet

First, readers are confronted with Mastricht’s skill in all phases of his work. Ryan McGraw has noted in an evaluation of Theoretical-Practical Theology Volume I that while Turretin bests Mastricht in precision and Brakel bests him in depth of devotion, Mastricht is no slouch in these areas. Further, Mastricht’s exegetical prowess and positive treatments of theology outstrip both other authors. Readers will find McGraw’s assessment accurate in this volume as well. Mastricht’s division of every chapter into a four-fold division of exegesis, dogmatics, polemics, and application creates an unbelievably well-rounded, comprehensive volume.

Read the full review here!

Jake Rainwater

Jake Rainwater (PhD, MBTS) is the Assistant Registrar and an adjunct instructor at Midwestern Baptist Theological Seminary. His Ph.D. research focused on the covenant of redemption, divine simplicity, and trinitarian action. He is a member of Emmaus Church in North Kansas City, serving in various lay positions. He is married to his high school sweetheart, and they have two young children that terrorize their Great Dane, Scotland.

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