At the 2007 Shepherds’ Conference, John MacArthur answered this question in a Q&A session:
How would you approach a congregation trapped in years of legalistic tradition?
The Shepherds’ Fellowship granted me permission to upload an MP3 of MacArthur’s 5-minute-and-20-second answer.
Here’s a summary. (It’s not a transcript, but it’s close. The headings are mine.)
1. Love them by not needlessly offending them.
- Advice. “I would not attack legalism. I would not preach on Christian liberty. I would not assault their consciences either by flaunting liberty on a personal level.”
- Scriptural principle. “I think there is a very important principle that comes at the end of 1 Corinthians 10 . . . . Do you offend the non-believer, or do you offend your weaker brother? The answer in that text is you offend the non-believer, and the message that the non-believer gets is that you love one another. . . . You defer always to the weaker brother.”
- Definition of legalism. “In many cases when you’re talking about legalism, you’re not talking really about works-salvation. You’re talking, I assume, about an approach to the Christian life that is needlessly restrictive and narrow and artificially constructed around certain behaviors that aren’t even biblical issues.” [Read more…] about John MacArthur on How to Serve Christians Who Are Needlessly Restrictive