D. A. Carson on the pastor as scholar and the scholar as pastor :
Now, any army needs quartermasters. They are the ones who provide the supplies to the frontlines. By all means, give appropriate honor to those who devote themselves to equipping and supplyingwith books, training, courses, modeling, answering questionsthose who will be on the frontlines.Yet it is possible to write learned tomes on apologetics without actually defending the gospel in the current world; it is possible to write commentaries without constantly remembering that God makes himself present, he discloses himself afresh, to his people, through the Word.
If you are an academic, you need to put yourself into places where, as it were, you take your place with the frontline troops from time to time. This means engaging the outside world at a personal level, at an intellectual and cultural level; it means working and serving in the local church; it means engaging in evangelism. Avoid becoming a mere quartermaster.
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