Of course the Talmud provides us with an insight into the answer.
In a thread I wrote some years ago I discussed the Jewish concept of Mazel. Mazel is basically an idea that there is a natural 'flow' to the world. That planetary bodies have gravity, moons rotate around planets, planets around suns, etc. Each one has in influence on the world and thus the natural flow of things is referred to as 'Mazel'.
Chabads definition of Mazel:
Mazal: a) A medium that conveys spiritual influence to worldly beings; in its Talmudic usage, the celestial constellations that serve this purpose. b) The root or main part of the soul, which is not experienced consciously.
But the Talmud says to us that 'Jews have no Mazel'. We are 'above' Mazel in that we are capable of beseeching Hashem to alter any 'natural' decree against us.
Here is this concept discussed at Torah.org:
http://www.torah.org/learning/perceptions/5767/lechlecha.htmlSHABBAT DAY:
He brought him outside and said, "Look toward heaven and count the stars, if you are able to count them!" He said to him, "So will be your descendants." (Bereishit 15:5)
The words "Mazel Tov" are meaningless. Either you have one or you don't, because mazel is the destiny with which a person is born. One's lifespan is also decided in advance, based upon the type of soul a person has (Sha'ar HaGilgulim, Ch. 35). That was the way it was for everyone, until Avraham Avinu came along, as the Talmud explains:
Rav Yehudah said in the name of Rav: From where do we learn that the Jewish People are not subject to mazel? It says, "He [G-d] brought him [Avraham] outside..." (Bereishit 15:5). Avraham said to The Holy One, Blessed is He, "Master of the World! 'The overseer of my house will inherit me!' (Ibid. 3)." He answered him, "Only that which comes out from your belly..." (Ibid. 4). Avraham said to Him, "But Master of the World! I saw through my astrology that I am not fitting to father a son."
He answered him, "Leave your astrology, for there is no mazel for a Jew!" (Shabbat 156a)
And, more accurately, there was no mazel for Avraham. There was for Avram as Avraham had clearly known, but the addition of the letter Heh represented more than just a name change; it was the opening of a spiritual door through which Avraham was allowed to "crawl" through to another plane of Hashgochah Pratit. As a result, "Mazel Tov!" gained new meaning, but only as a result of getting our own mazel as a result of our mesirat Nefesh (self-sacrifice) in the line of duty for G-d.
Thus, Pinchas, as a result of his deed of self-sacrifice, completely changed his mazel, from that of Pinchas ben Elazar HaKohen to that of Eliyahu HaNavi. At first he was a virtual nobody, and then he did act of zealousness and became a somebody. And not only did he become somebody, but he specifically became the prophet turned into an angel whose job it is to herald in the coming of Moshiach, may it be in our time, and all because he took "248" in hand.
This is why the word for "womb" is "rechem", the same letters again as the word "ramach" (248) and "romach" (spear), because birth is the first stage of transformation of mazel. This is because inside the womb the fetus is very much a part of the mother, and its mazel is bound up with hers. However, once the child is born it is subject to its own mazel and grows into a position whereby his or her own actions have the power to change it.
Kabbalistically, this transformation is seen as the change from "chometz" to "matzah", each of which is three letters long and each of which contain a "Mem" and a "Tzaddi". However, "chometz" has the letter "Chet" in it also, whereas "matzah" contains the letter Heh, which is like a Chet except that the left leg of the letter is broken. It is this break in the left leg of the Chet that transforms it into a Heh and which created the little "window" in the upper left-hand corner through which, the Talmud says, the person who has done teshuvah is able to crawl back "in".
Hence, Avraham Avinu is identified with the holiday of Pesach because it is the holiday during which, the Leshem explains, the world is created anew. And, as we rid ourselves of chometz and replace it with matzah, we in fact transform the Chet into a Heh all over again, and create a spiritual portal through which have the potential to ascend to a higher dimension of Hashgochah Pratit, and ascend above the mazel with which we were born.
WebShas provides a reference to the Talmud. Here is a list of all the tractates which contain concepts related to Mazel.
http://www.webshas.org/science/misc/super/mazalos.htmMazal as a general influence, which a person may use positively or negatively: Shabbat 156a
Astrologers and sorcerers prophesy without understanding what they are seeing: Sotah 12b
Having Children, life-span, and financial success depend upon Mazal: Moed Katan 28a
People have Mazal, protecting them from harm: Bava Kama 2b [See Rashi]
Whether Mazal affects wisdom and wealth: Shabbat 156a
Whether Jews have Mazal or not: Shabbat 156a-b; Succah 29a; Nedarim 32a
Whether Mazal affects those who do Mitzvos: Shabbat 156b
The Mazal of Converts was at the Giving of the Torah: Shabbat 146a
Rich People are at less risk from Ketev-Spirits, because their Mazal is good: Rashbam Pesachim 111b "Shaata"
Angel of Livelihood appreciates neatness, Angel of Poverty enjoys sloppiness: Pesachim 111b
Combing a dry scalp, drinking drips from a wine barrel, and placing shoes on wet feet, are causes of Blindness: Pesachim 111b
Publicizing word of one's illness: Nedarim 40a
Placing bread, as opposed to fish or meat, in a hanging basket, can lead to poverty: Pesachim 111b
Having bran or the remains of bread around can lead to poverty: Pesachim 111b
Having a dish atop a barrel can lead to poverty: Pesachim 111b
Beruksi comes from drinking water from a dish: Pesachim 111b
Saying a form of "LeChayyim" ["To Life"] before drinking wine: Shabbat 67b
Mazal of the months of Av and Adar: Taanit 29a-b
Pharaoh had the boys thrown in the river because his astrologers informed him that the Jews' redeemer would die by water. In fact, this prophecy referred to Moses's problem with the Waters of Merivah, when he hit the rock: Sotah 12b
Ex-communication of Barak on "Mayroz" who was either one of Sisra's leaders or Sisra's Mazal: Moed Katan 16a
Daniel perceived a group of Angels, although Chananiah, Misha'el and Azariah did not; their Mazal did, though: Megillah 3a