The quality or practice of speaking with thunderous, forceful, or passionate rhetoric; vehement preaching.
From Boanerges plus the suffix '-ism' (forming an abstract noun describing a quality or practice). Created in English theological and rhetorical contexts to describe a style of forceful speaking.
Boanergism captures something specific in the history of preaching—the belief that religious truth should be delivered with thunder and passion rather than quietly, which explains why some of history's most memorable preachers are described as embodying boanergism!
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