Halakhah su Salmi 33:15

And the whole matter of these quarantines indicates His providence, blessed be He, on all the ways of man - one by one. And because the opinions are many about the providence of God upon all of his creatures, many verses in Scripture and many commandments come about it, to instruct about the matter - given that it is a cornerstone in our Torah. As there are groups of people that think that the providence of God, may He be blessed, is [individualized upon all of the species - whether people or all other animals. And there are groups that think that the providence of God, blessed be He, is] upon all the matters of the world - whether animals or all other things - meaning to say that no small thing in the world moves without His will, blessed be He, and His decree; to the point that they think regarding the falling of one leaf from a tree, [that] He decreed about it that it should fall, and [so] it is impossible that the time of its falling be even a second later or earlier. And this opinion is very removed from the intellect. And there are evil groups that think that His providence, blessed be He, is not put upon any matters of this lowly world at all - whether upon people or other animals. And this is the opinion of the heretics - it is evil and bitter. And we who have the correct opinion, according to what I have heard, place His generalized providence, blessed be He, upon all the species of animals, such that each and every species that was created in the world, survive in the world - [that] it not completely finish and be lost - as with His providence does everything find existence in the world. But with the human species, we believe that His providence, blessed be He, is upon each and every one individually, and He is 'the One who understands about all of their deeds.' And so [too,] have we received from all of our great ones; and there are also many verses that instruct that the matter is so. And therefore, the Torah warned us that when this bad illness - and that is tsaraat - reach a man, he should not take it [as being] by way of happenstance. Rather, he should immediately think that his iniquities caused [it]. And he should distance himself from the company of people, like a man who is distanced due to the evil of his deeds. And he should associate with the one who can atone - the one who can heal the fracture of the sin - and show his ailment to him. And through his counsel and through his words, and through the examination of his deeds, the ailment will be removed from him - since God, blessed be He, who constantly watches him, will see the act of his repentance and heal him. And this matter is the matter of the quarantines, as we said.