Her prayers were not so fervent, her aspirations not so strong.
Perhaps "love" is left to the fervent vocabulary of the lover.
She was "diligent in business," but this did not preclude her being "fervent in spirit."
Does she suspect that your fervent friendship may lead you to a small indiscretion?
"I think there's nothin' to equal 'em," was the fervent answer.
My attachment ...