If you’ve been in pastoral ministry for any length of time at all you’ve asked the question: Is my preaching actually doing anything? Is it having any effect?

The question could be addressed on several different grounds. It could be addressed on historical grounds, pointing to the powerful effects of preaching in various times and places in the history of the church, notably, from the beginning in the book of Acts. It could be addressed on personal grounds by means of collected anecdotes—“Let me tell you about Joe and Mary Black and what God did in their lives through the faithful preaching of God’s Word.”

But without question, the most compelling response is going to be a theological one, grounded in the realities presented in Scripture regarding who God is, what he is doing, what his Word does, and what he fully intends preaching to accomplish.

AN UNDER-CELEBRATED CHARACTERISTIC

We rightly celebrate the authority, the trustworthiness, and the sufficiency of Scripture. But perhaps an under-celebrated characteristic of Scripture is its efficacy. By “efficacy” I simply mean the ability to actually accomplish what is intended.

Probably the clearest statement on the efficacy of Scripture is found in Isaiah 55:10–11:

For as the rain


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