Musar su Esodo 12:48

We read in 12,48 that any male convert who wants to participate in the celebration of the Passover [in later years, after the Exodus. Ed.] must first circumcise himself. The same applies to a slave owned by a Jewish master (12,44). The reason is simply that as long as the powers of impurity are still a tangible part of such a male by reason of the presence of his foreskin he is not fit to approach the Presence of G–d. It is only by revealing the sign of the holy covenant that he becomes fit, and the Divine Presence is viewed as if drawing nourishment from that sanctified spot of the Covenant. There is another dimension to the inability of Israel to be redeemed except by the combination of the blood of circumcision and the blood of the Passover lamb. I have elaborated on this in the treatise cited above; here I will only summarize. A major component of the experience in Egypt was the need to re-instate the Holy Covenant and to repair the damage of the 130 years during which Adam had not maintained marital relations but had emitted semen which resulted in the creation of destructive agents in this world. This is why the redeemer (Moses) was born only 130 yars after the family of Jacob came to Egypt. Yochevet was 130 years old when Amram re-married her and when Moses was born, and she herself was conceived in the land of Canaan, but was not born until Jacob and his family arrived in Egypt, [viz: Rashi when reconciling the numbers of the Israelites who came down to Egypt as counted in Genesis 46,26. Ed.] I have alluded to this fact already several times in פרשת שמות.