KIslev And Toldos

What is the connection between the adjacent Rosh Chodesh Kislav and parshat Toldot?  

There are two cycles to the order of the year. The months following from Tishray are when a person has to give a push to come close to Hashem.  It is a time of אתערותא דלתתא.   The months counting from Nissan are a time of אתערותא דלעילא, when Hashem comes close to a person.  The Maharal writes that the number one is complete unity, two is when there is division and three is when two things can come together. Mattan Torah was in the third month for it is when man becomes united with Hashem.  Sivan is the unity of אתערותא דלעילא and Kislev is the unity of אתערותא דלתתא.  The first month is Nissan.  According to that count, in the third month, in Sivan was Mattan Torah.  There is a cycle from Tishray as well.  The first month is the time when we are drawn to be one with Hashem.  In the second month we are divided, it is a time when there are no special times, it is the humdrum of daily life.  The third month from Tishray is Kislev, it is the time when of unity with Hashem when man comes close toward Hashem.  It is the Mattan Torah that man initiates.  As many seforim say the Chanukah lights represent the light of the Torah שבעל פה, the light of the Torah man initiates.  That event is celebrated in Kislev.  It is the hidden Torah which must be drawn out from within a person just as the oil must be drawn from within the olive.  That is why the word כסלו is constructed out of the words כס לו, the כס is a cover as in בכסא ליום חגנו and לו means its revealed (the 6 seferot of revelation *6 of intertwining.)  It is a time when the hidden Torah, the Torah which is drawn out by man from within the Torah is revealed  (see Toras Meachem Toldot 5752.)  (That is why after the war with Amalek it says על כס קה, the כסא is incomplete, it is covered until the א, the אלופו של עולם can be recognized.) 

Avraham is chesed, that is the אתערותא דלעילא when one is offered a free opportunity.  Yitchak is gevurah, it is about making the person draw out their own potential as discussed here.  That is why his parsha coincides with Rosh Chodesh Kislev which ushers in the time of man bringing out their potential.