"Fervent belief" refers to a very strong and passionate conviction or faith in something. It means holding a deep and intense belief in a particular idea, principle, or cause. Full definition
The manmade global warming movement incessantly appeals to authority, and it offers under the shelter of that authority the psychological satisfactions of fervent belief. (nas.org)
Two camps, each with fervent belief about the name of the Ed School, have emerged. (gse.harvard.edu)
Two camps, each with fervent belief about the school's name, have emerged. (gse.harvard.edu)