The Threefold Use of the Law
1. A usus politicus or civilis. The law serves the purpose of restraining sin and promoting righteousness. Considered from this point of view, the law presupposes sin and is necessary on account of sin. It serves the purpose of God’s common grace in the world at large. This means that from this point of view it cannot be regarded a means of grace in the technical sense of the word.
2. A usus elenchticus or pedagogicus. In this capacity the law serves the purpose of bringing man under conviction of sin, and of making him conscious of his inability to meet the demands of the law. In that way the law becomes his tutor to lead him unto Christ, and thus becomes subservient to God’s gracious purpose of redemption.
3. A usus didacticus or normativus. This is the so-called tertius usus legis, the…
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