The Jewish nation mourned for thirty days following the passing of Moses. (During this time, Joshua, the new leader of the Jewish nation, sent scouts to spy on the land of Canaan, see Jewish History for the 5th of Nissan).
On the 7th of Nissan, the first day after the mourning period came to an end, Joshua instructed the Jews to stock up on provisions and prepare themselves to cross the Jordan river and begin the conquest of the Promised Land. This was the first time Joshua addressed the nation, and they unconditionally accepted him as their new leader.
The actual crossing occurred on the 10th of Nissan.
In 1890, Dr. Moshe Wallach emigrated from his native Germany to the Land of Israel. Ten years later, he founded the Shaarei Zedek Hospital, one of Jerusalem’s most prominent hospitals. Dr. Wallach was a strictly observant Jew, and the hospital protocol follows Shabbat and kashrut observance, and provides religious services for both weekdays and holidays.
In 1929, during a journey by boat from Alexandria to Trieste, Dr. Wallach cured Rabbi Yosef Yitzchak Schneersohn when he fell ill with a kidney ailment.
Link: Cause and Effect
In today's "Nasi" reading (see "Nasi of the Day" in Nissan 1), we read of the gift bought by the nasi of the tribe of Ephraim, Elishama ben Amihud, for the inauguration of the Mishkan.
More than Rosh Hashanah is about the One Above, it is about us below.
He created the world. But we drive it to its destiny.
That is why it is called “the beginning of Your works”—even though it is not the anniversary of the creation of the universe, but of the human being. It is the true beginning, as all of time begins on this day.
Because on this day, more than any other, we are empowered to switch tracks, to transform our destiny and thereby the destiny of all of creation. Through us, the bitter darkness that shrouded truth and goodness can become a flaming torch of light.
All is defined by the destiny to which it leads. Even the past is redefined by the arrow of its future. The very existence of that time that held that past is re-created once it achieves its hidden destiny. A destiny that only you can reveal.
That is all that matters: What you do with your life right now.
Because today is the first day of your entire life, future and past.