In light  of eternity

Turretin’s Institutes, Post 6 — Topic 1, Question VII

This one has real consequences either way you answer it. If theology is just information to know, someone could master it and remain totally unaffected by it. If it’s purely about behavior, doctrine barely matters as long as you’re a decent person. Turretin’s answer shapes how seriously we should take right belief and right living, and how the two actually relate to each other.

Why This Was a Live Fight

The Socinians and Remonstrants (Arminian-leaning theologians) pushed hard toward making theology almost purely practical — a matter of obedience to precepts and confidence in promises, full stop. That wasn’t an innocent emphasis. It was a strategy: if theology is fundamentally about behavior rather than belief, then doctrines like the Trinity or the incarnation can be quietly waved off as non-essential “theological conclusions,” opening the door to a minimal, low-doctrine common religion nearly anyone could sign onto.

The Argument

Turretin lands in the middle: theology is neither purely theoretical (contemplation with no necessary connection to practice) nor purely practical (action with no necessary content of belief). He calls it theoreticopractical — a genuinely mixed kind — and adds that it leans more practical than theoretical, because no theory is actually saving unless it leads somewhere. Knowledge that never issues in worship isn’t theology’s finished product; it’s an unfinished one.

His supporting case: the object of theology (God) is meant to be both known and worshipped. The human being is meant to be perfected in both understanding and will. Scripture itself has this same dual shape — law tells us what to do, gospel tells us what to believe. And God’s own nature makes the two inseparable: as Turretin puts it, light and heat can never be separated from each other in the sun. Real knowledge of God that produces no practice isn’t really knowledge of God; real practice that isn’t guided by right knowledge isn’t really right practice.

So What?

This is a rebuttal to two errors that are still very much alive today. One is pure intellectualism — “I’ve got the correct doctrine, that’s what matters,” with no expectation that it changes anything about how you live. The other is pure moralism — “doctrine doesn’t matter, just be a good person,” with belief treated as optional decoration. Turretin’s answer to both: they’re inseparable, like light and heat radiating from the same source. You don’t get to keep one and discard the other.

This post covers Turretin’s Institutes of Elenctic Theology, Volume 1, Topic 1: Theology, Question VII: “Is theology theoretical or practical?” If you’d like to read Turretin’s own words in full, the complete 3-volume set (Giger’s translation, ed. Dennison) is available from Amazon or Christianbook.com.