And afterwards his brother emerged, and his hand was grasping the heel of Esav. And they called him by the name Yaakov… (25:26)
Even the Lowest of Jews are Good at Their Essence:
The Yismach Moshe zy”a sees a hint in this verse that even though we sometimes see good traits in the offspring of Esav, when we look into their “heel”, bottom of the matter, we find that they only act kindly if they see it as a means to benefit themselves. Regarding Yaakov’s offspring, the opposite is true. Even the lowest of them sin only when their desires overcome them, but if we look at the meaning that we go down to the bottom of the matter, we will see that they are all really good. Accordingly, the pasuk is saying that “Yaakov’s hand is by the heel of Esav”, meaning that the place where the goodness of Esav ends is the place where the lowest of Yaakov starts.