The excellency of holy courage in evil times by Jeremiah Burroughs

Thirdly: Much evil comes of Passion being inordinate, because, being as distempered Fire that comes from a Disease, it eats out the natural heat: as in the Body, the heat of the Fever that is distempered, it consumes the true natural heat. And so, though there be some natural heat, or some kind of goodness, and kindness naturally in a man, that heat and goodness is taken away if he be in any passion; And therefore one brings in this comparison. ⟨p. 7⟩Kindness is as one that is very hot naturally, when passion comes, it doth consume and take away the good natural heat, and he is altogether carried on in a distempered heat.

Thirdly: Much evill comes of Passion being inordinate, because, being as distempered Fire that comes from a Disease, it eats out the natural heat: as in the Body, the heat of the Feaver that is distempered, it consumes the true natural heat. And so, though there be some natural heat, or some kind of goodness, and kindness naturally in a man, that heat and goodness is taken away if he be in any passion; And therefore one brings in this comparison. ⟨p. 7⟩Kindness is as one that is very hot naturally, when passion comes, it doth consume and take away the good natural heat, and he is altogether carried on in a distempered heat.

Fourthly: Wrathful passion doth warm all the Lusts that lodge in the heart, and put an activeness into them, whereas before they were cold, and like Snakes, being cold do not stir, but if they come to be warm, then they crawl about and sting: And so many corruptions lie in the hearts of Men and Women, that are congealed with cold, and like Snakes lie and do not stir; but when the heat of passion comes, it puts a heat into all those corruptions, and then they crawl forth and make woeful work.

Fourthly: Wrathful passion doth warm all the Lusts that lodg in the heart, and put an activeness into them, whereas before they were cold, and like Snakes, being cold do not stir, but if they come to be warm, then they craule about and sting: And so many corruptions lie in the hearts of Men and Women, that are congealed with cold, and like Snakes lie and do not stir; but when the heat of passion comes, it puts a heat into all those corruptions, and then they craul forth and make wofull work.