The following is a freely-translated excerpt from a letter the Rebbe wrote in
the fall of 1961 to a Jewish woman living in Madagascar:
...It was with pleasure that I received regards from you and your husband,
through Rabbi Joseph Weinberg, upon the latter’s return from his visit in your
community. It was a double pleasure to hear from him about your and your husband’s
warm and willing response to the task of unifying the Jewish families in your
area and bringing them closer to the practice of Judaism; especially that your
husband has taken it upon himself to teach the children, which is of increased
importance in our times, for today it is the children who influence their
parents.
Certainly you and your husband are aware of the principle of "specific
divine providence"-a principle that is a mainstay of our faith in general, and
of the teachings of Chassidism in particular. "Specific divine providence"
means that every event, great or small, that occurs in the world, whether
involving an inanimate object, a growing thing, an animal or a human being, in
its every detail and sub-detail, does not occur by chance, G-d forbid, but is
specifically ordained by G-d as part of His intentions and purpose in His
management of the world.
Therefore, it goes without saying that when a Jew finds himself in a distant
corner of the world, far from his homeland, far from any established Jewish
community, this is certainly not by chance. This Jew should see himself as an
emissary of the Omnipresent through whom G-d’s word may reach also this corner
of the world, bringing about an increase of justice and righteousness among all
its inhabitants, and spreading the teachings and observances of Judaism among
its Jews.
In such a case, one should not look upon the number of individuals that one
has the opportunity to influence. Our sages have said, “Whoever upholds a
single Jewish soul, it is as if he has upheld an entire world.” If this is
true at all times, how much more so does it apply to our generation, after the
destruction, Heaven forfend, of such a significant portion of our people. Today,
every surviving Jew is a "brand salvaged from the fire" who must not only
fulfill his own role, but also take the place of those who perished in
sanctification of G-d’s name..