When Hashem told Avraham Avinu to count the stars, he began to count them.  Hashem said, “this is how your children will be.”

Rav Meir Shapiro zt”l explained that if anyone other than Avraham, would have been given the task to count the stars, their immediate response would have been, “That’s impossible!  There are too many stars to count!” But when Hashem told Avraham to count the stars, he began counting them.  Hashem said, this is how your children will be.  They will never say that a task is impossible.  They will always try to do what they can. ~ R’ Elimelech Biderman, Shlita