New Defender's Study Bible Notes
5:19 Quench not. In its other New Testament occurrences, “quench” refers to putting out fire. When the Holy Spirit is clearly using a Christian in a ministry to which He has called him, he should be encouraged and assisted, not criticized and hindered, assuming, of course, that it is really the Spirit’s work and not of the flesh. The best test for this, of course, is fidelity to the Scriptures (Isaiah 8:20).