"Moses went up to the mountain, and the cloud covered the mountain...for six days. On the seventh day G-d called to Moses from within the cloud... And Moses came within the cloud, and he went up to the top of the mountain, and Moses was upon the mountain forty days and forty nights" (Exodus 24:15-18).
On the morrow of the giving of the Ten Commandments (see Jewish History for the 6th of Sivan), Moses ascended Mount Sinai in order to receive from G-d the remainder of the Torah -- the remaining commandments and the Oral Law. After being "cleansed" by the cloud for six days, he was ushered into the presence of G-d on the 13th of Sivan.
Following the War of Independence (see Jewish History for the 6th of Iyar), citizens in many Arab countries began harassing their Jewish co-citizens, often times inflicting casualties and substantial property damage.
The 5,000 Jews living in Cairo, Egypt were also repeatedly victimized. On the 13th of Sivan a bomb exploded in the Jewish quarter of Cairo, murdering 22 Jews and wounding more than 40 others.
The systematic persecution caused most Egyptian Jews to flee, many choosing to move to Israel. Today, there are virtually no Jews remaining in Egypt.
A college student once asked the Rebbe what is his job. The Rebbe gestured to the ceiling of his room and replied:
Do you see that light bulb? It is connected by wires to an electrical generating station that powers the whole of Brooklyn. And that plant is connected to turbo-generators at Niagara Falls that power the whole of New York State and more.
Every one of us is a light bulb wired into an infinitely powerful generator. But the room may still be dark, because the connection has yet to be made, and it is hard to find a switch in the dark.
The job of a rebbe is to take your hand in that dark room and help it find the switch.