The Jews who had returned to the Land of Israel with Ezra and Nehemiah gathered on this day and repented their misdeeds, signing a document in which they committed to trust in G‑d and follow His ways. Among the mitzvot they specified were to refrain from intermarriage and from purchasing produce on Shabbat (Nehemiah 9:1–3; 10:1–32).
Link: The Return to Israel
R. Yaakov Yosef was one of the foremost disciples of the Baal Shem Tov. He was the first one to disseminate the teachings of Chassidut in print, publishing the work Toldot Yaakov Yosef in 1780.
Link: The Rabbi’s Secret Sins
On this day in 5756 (1995), the Ribnitzer Rebbe, Rabbi Chaim Zanvil Abramowitz, passed away. For decades, with great self-sacrifice, he lived a full Chassidic lifestyle under Soviet rule before emigrating to Israel and then the U.S.
The day following a festival is called Isru Chag ("tied to the festival"). Tachnun (confession of sins) and similar prayers are omitted throughout the remainder of the festive month of Tishrei.
Know as clear as day and contemplate this deeply, that He who emanates all into being is He who rules and judges this world. In the heavens above and on the earth below, there is nothing else. (Deut. 4:39)
The same G‑d who transcends all time and space is the same G‑d manifest in all the forces and fields of physics.
The same G‑d from whom all existence emerges is the same G‑d who conceals that truth from every conscious being, providing space for each one to be that which it is.
The same G‑d from whom all life extends is the same G‑d who restrains that energy, with kindness, so that finite creatures can exist, to the tiniest worm hiding in the bowels of the earth.
And when you know all this, and you contemplate it well…
…that the very substance of each thing is nothing more than an articulation of divine energy, that even time and space extend from Him at will, as do the very limitations and sense of existence of each creation, that darkness is His presence as much as light, hiddenness as is revelation, matter as is energy, somethingness as is nothingness, for He is both beyond and within each place, moment and thing…
…then you will know that there really is nothing else. Nothing else but the one G‑d.
As the Baal Shem Tov would say in simple, succinct form: Divine energy is all there is, and everything is divine energy.