Rabbi Shalom Sharabi, known by his name's acronym, the RaShaSH, was born in Yemen, and as a young man immigrated to Israel. He was quickly recognized for his piety and scholarship, especially in the area of Jewish mysticism, and was appointed to be dean of the famed Kabbalistic learning center in the Old City of Jerusalem, the Yeshivat ha-Mekubbalim.
He authored many works, mostly based on the teachings of the great kabbalist, Rabbi Isaac Luria, the Ari. Rabbi Sharabi's most famous work is a commentary on the prayerbook, replete with kabbalistic meditations.
His mystical works are studied by kabbalists to this very day. He is also considered to be a foremost authority on Yemenite Jewish traditions and customs.
Link: What Is Kabbalah
Rebbetzin Rivkah Schneerson was born in Lubavitch in 1833; her maternal grandfather was Rabbi DovBer, the 2nd Rebbe of Chabad-Lubavitch. In 1849 she married her first cousin, Rabbi Shmuel, who later became the fourth Lubavitcher Rebbe. For many years Rebbetzin Rivkah, who survived her husband by 33 years, was the esteemed matriarch of Lubavitch, and Chassidim frequented her home to listen to her accounts of the early years of Lubavitch. She is the source of many of the stories recorded in the talks, letters and memoirs of her grandson, Rabbi Yosef Yitzchak (the sixth Lubavitcher Rebbe). The Beth Rivkah network of girls' schools, founded by Rabbi Yosef Yitzchak in the 1940's, is named after her.
Links:
Watch a video about Rebbetzin Rivkah
Read a story of the great-grandfather of Rebbetzin Rivkah
The sixth Lubavitcher Rebbe, Rabbi Yosef Yitzchak Schneersohn, passed away on Shabbat morning, the 10th of Shevat, of the year 5710 from creation (1950)
At a gathering of Chassidim marking the first anniversary of the passing of the sixth Lubavitcher Rebbe, the late Rebbe's son-in-law, Rabbi Menachem Mendel Schneerson, delivered a Chassidic discourse (maamar) entitled Basi LeGani ("I Came into My Garden"), signifying his formal acceptance of the leadership of the Chabad-Lubavitch movement.
Links:
Yud Shevat: A Day of Two Rebbes
Learn Basi LeGani
Biography of Rabbi Yosef Yitzchok
Biography of Rabbi Menachem Mendel
Yahrzeit Observances (The Rebbe's Letter)
Chabad Chassidim observe the customs of the yahrtzeit (anniversary of the passing) of the sixth Lubavitcher Rebbe, Rabbi Yosef Yitzchak Schneersohn (1880-1950), as established by his son-in-law, Rabbi Menachem Mendel Schneerson (1902-1994), who succeeded him as Rebbe following his passing on the 10th of Shevat in 1950.
There are two sorts of inner convictions of the soul, this thing we call faith.
Unbound by the confines of space and time, your soul sees a reality your mind cannot fathom. From that vision seeps down a conviction that G-d is with you, that He is good, and that there is really nothing else but Him.
Not because you understand. But because your soul sees that this is so. And she sees with a clarity and certainty the flesh eye could never attain.
Nevertheless, a higher vision means there are two and not one: There is you and there is the vision you perceive. And if there are two, two can be separated.
So that, when darkness and confusion swells and storms, threatening to rip you away from your G-d, a higher vision is not enough.
That is when you need to reach to the very core of your soul. Not to that place in the soul that sees G-d, but to the essence of the soul that is truly a part of G-d.
To say, "This is my G‑d. I am His, He is mine, and we are one."
"And so, nothing can stand between us."