And the children clashed within her (Bereishis 25:22).
Whenever she passed the entrances to the House of Study of Ever, Yaakov struggled to exit, [whenever] she passed the entrance to houses of idol worship, Esav struggled to exit (Rash) to Bereishis 25:22).
The Midrash cited by Rashi requires much study, for it seems to imply that Esav and Yaakov were already fixed in their tendencies to evil and righteousness, respectively, prior to birth. That would seem to contradict the very foundation of Torah: the principle of free will.
Rambam begins Hilchos De’os with a discussion of in-born personality traits and predispositions. For instance, he writes, some people are by nature cruel and others merciful. Yet Rambam in the fifth chapter of Hilchos Teshuvah is emphatic that a person’s nature does not cause him to be righteous or evil, merciful or cruel, wise or foolish, generous or stingy. The choice lies completely in his own hands. Aside from the apparent contradiction with Hilchos De’os, this statement is problematic for another reason. The assertion that wisdom or foolishness is not decreed seems to contradict the Gemara (Niddah 16b), which states clearly that wealth, strength, and intelligence are decreed at conception. Only whether one will be righteous or wicked is not decreed.
Resolution of the problem of in-born traits with individual free will is based on the following premise: While no two people are born with the same exact character traits, and those traits are influenced by many factors – including spiritual forces both prior to and at conception – these traits are not inherently good or bad. They are pareve. A predilection towards anger, for instance, is not necessarily an evil trait. There are situations when anger is required and is the correct response. Similarly, all natural traits and tendencies can be directed in both positive and negative directions. The tendency to shed blood, for instance, can be utilized as a shochet, a mohel, or surgeon, or it can be directed towards crime and murder. Although the character traits are predetermined, their function and control are totally in the hands of the individual. He exercises his free will in utilizing them for good or bad, and suppressing these tendencies when necessary.
Wisdom and intelligence are two distinct realms. One can have the IQ of a genius and act like a fool, and one can lack a high IQ and yet act with wisdom. Although intelligence is largely predetermined, as the Talmud states, whether one acts wisely or foolishly is, as Rambam writes, a function of one’s free will.
There is, however, one point that still needs to be clarified. While it is true that no single character trait or tendency is intrinsically good or bad, there are nevertheless certain traits that are more conducive to righteous conduct and those more prone to evil. A tendency towards anger, for example, is more prone to be abused, since there are more instances where anger is negative than where it is positive. By contrast, a natural tendency towards calmness is more prone to lead one to righteous conduct, since there are more instances where this behavior is positive than not.
Thus the difference in natural tendencies might seem to contain an element of injustice. But three points must be kept in mind. First, every person embodies a myriad of character traits. Though someone may be born with a trait that is predominantly negative, he will almost certainly have other traits that are predominantly positive. Secondly, Hashem takes into consideration one’s predispositions in determining the situations he will be confronted with in life. Finally, as the Vilna Gaon states, Hashem judges each individual in relation to his specific nature. Hence, a person prone to anger by nature will be judged less harshly if he succumbs to a fit of anger than a person who is by nature calm. Likewise, a person with a predisposition to anger will receive more reward for controlling his anger than a person with a calm disposition.
Considered in this light, the Midrash is not telling us that Yaakov and Esav were acting in a good or evil fashion prior to birth. Rather they displayed tendencies towards either the more spiritual aspects of this world or the more physical. The houses of Torah study represented the epitome of spirituality and those of idolatry the epitome of physicality (idol worship being the deification of physical forces).
(Rabbi Zev Leff)