Likkutei Sichos vol. 15

The eclipse of the sun and moon and its effect on human beings.

The Korbonos of Kayin and Hevel.

The revelation of Pnimius HaTorah and the development of science and technology, preparing for the days of Moshiach.

Human beings and Yidden created in the image of Hashem.

The eternal lesson of the Avodah of the Avos recorded in Torah.

Man is born to toil. Toil of labor, speech, and Torah.

The wells of Avraham or Yitzchak?

Torah scholars and Tzadikim don't rest in this world and the world to come.

Avrohom's influence in bringing recognition of Hashem in the world and its relevance to Yitzchok's Shidduch.

Avrohom marries another wife and her name is Keturah.

Yitzchok not leaving Eretz Yisroel in the view of Rashi an Midrash.

The age Yitzchok was concerned his time has come.

The three Batei Mikdash and relation to three Avos.

Yaakov and his flock of sheep and the lesson for us.

The two interpretations of "Ki Bemakli" and its meaning in Igeres Hakodesh.

The king of Edom from Basra and Yaakov dealing with Esav.

Yaakov desires to live in peace in this world.

The story of Yehudah and Tamar and the significance of the signet ring and garment she requested from Yehudah.

Explaining the Nusach of Haneiros Halalu.

Chanukah and bringing peace into the world.

The month of Teves and the connection to Chanukah and other dates in the month.

The weaker of the Shevatim presented to Paroh. The names of some Shevatim being repeated in Moshe's Bracha.

The transformation of the fasts into joy.

Yaakov and Yosef's connection to Menashe and Efraim.