These parshiyos deal with the development of our Avos, and the common theme between all the challenges that Hashem put our Avos through is Emunah. Throughout our lifetime, challenges never cease. You should know that each one of us, in some form or fashion, endures the ten nisyonos of Avraham Avinu.
In this week’s parshah,we encounter a tremendous episode where Hakadosh Baruch Hu has a discussion with Avraham Avinu. Avraham Avinu says, הן לי לא נתת זרע, I don’t have children, והנה בן ביתי יורש אותי, behold my steward [Eliezer] will be my heir (Bereishis 15:3). True, a stranger won’t be the one to inherit me, but it’s not going to be my son.