Randy Alcorn was interviewed on his updated book The Treasure Principle. In this audio clip, he answers a question about tithing.
Why I Don’t See Tithing as the Pinnacle of Christian Virtue, OR as Something Legalistic
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Randy's blog
I first became aware of tithing as a teenager when my pastor preached on the importance of supporting the local congregation. His sermon drew on Galatians 6:6: “Anyone who receives instruction in the word must share all good things with his instructor.”