Musar sobre Génesis 4:15

The differences in atonement
In the same way as the body has sicknesses and ailments, so too does the soul. And the ailments of the soul and its diseases are its evil traits and its sins. But when an evildoer repents from his evil path, God, may He be blessed, heals the soul of the sinner - as it is stated (Psalms 41:5), “O Lord, have mercy on me, heal my soul, for I have sinned against You.” And it is [also] stated (Isaiah 6:10), “and repent and save itself.” And in the way that it is sometimes found with the sicknesses of the body that the sickness lightens itself from upon one, as does the length of most of the ailments, but the body is not cleansed of it without drinking a bitter drink and suffering further by afflicting his soul from [eating] all desirable food; so too is it with the soul sick from great iniquity: And even though most of the sickness is healed, and most parts of the punishment are removed after the repentance - and God, may He be blessed, has gone away from His anger - the soul will not yet be cleansed from the sickness and its sin will not be atoned until the sinner is made to suffer with afflictions, purified with pain and with bad and difficult things that happen to him. [This is] like the matter that is stated (Genesis 4:13-14), “My punishment is too great to bear! Since You have banished me this day from the soil, and I must avoid Your presence; and I shall be a fugitive and a wanderer in the earth; and it will come to pass, that whoever finds me will kill me.” However through repentance, most of his iniquity was forgiven, the main part of his punishment was removed and he was rescued from death - as it is stated (Genesis 4:15), “and the Lord put a mark on Cain, lest anyone who met him should kill him.” But the punishment of exile remained for him, as it is stated (Genesis 4:12), “and I shall be a fugitive and a wanderer in the earth.” Yet he had mentioned [his] migration with a double expression (fugitive and wanderer); whereas after the repentance, it is [only] stated (Genesis 4:16), “and he dwelt in the land of wandering.”

This also helps explain Yitro's question "ואיו, למה זה עזבתן את האיש" (Exodus 2,20) "where is he, why did you abandon the man?" The sequence should have been , למה זה עזבתן את האיש, ואיו, "why did you abandon the man, and where is he?" Then the letter ו would be justified as a letter denoting something additional. Yitro was not clear whether he should understand the words איש מצרי literally, i.e. an Egyptian, or whether he should read a more profound meaning into it as we have just described. Therefore, he said "call him so he can eat bread." These words would be appropriate both if the man was indeed an Egyptian in which case he deserved to be rewarded at least with a meal. If, on the other hand, איש מצרי meant what we have just described, then the words "call him and he shall eat bread" is a euphemism for offering Moses one of Yitro's daughters' hand in marriage, since clearly one of them was meant to become Moses' wife. This is why he said ואיו, the letter ו both at the beginning and at the end of the word אי "where?" That letter could then be applied to either possibility. It would then be a reminder of G–d's original question "אי" "where is your brother Abel?" (Genesis 4,9) Another possibility is the one mentioned by the Zohar, that the letter ו is symbolic of the sign, אות that G–d gave Cain, i.e. a letter from the holy Torah, so that no one who came across him would kill him as a murderer. (Rosenberg Montreal edition page 42)

This also explains the Midrash saying that Tzipporah was so named, since like a bird, צפור, she purified, the reference being to the offerings of צפורים to signify purification of people who had previously been afflicted with צרעת (Shemot Rabbah 32; Leviticus 14,4). Similarly it is used to purify the house afflicted with certain kinds of stains (Leviticus 14,49). Rabbi Yossi used to refer to his wife as "his house". As long as this twin sister of Abel had been under the control of Cain,- maybe she (Tzipporah) blamed G–d. Cain was jealous, blaming his fate on the original sin of his father Adam who had brought contamination into the world, had made him an outcast like the מצרע the person afflicted with that skin disease. This fits because we know that such an affliction is usually due to slanderous talk of a person (Eyruvin 15). Moses' staff, מטה, was rooted in the עץ החיים, tree of life, the סוד of Abel who had not been tainted with sin. Abel lived for 49 days as the Ari zal explains the meaning of the word שבעתים "sevenfold," to mean seven times seven (Genesis 4,15). The word יקם, "will be avenged," is composed of the respective letters in the threesome יתרו-קין-מצרי. Abel lived 49 days in this world which was created with the letter "ה" (Genesis 2,4, see Menachot 29). The number 49 is equivalent to the numerical value of the word מט"ה, Moses' staff. The letter ה in the word is a reference only to G–d having created the world with the help of that letter. It became the staff and symbol of Moses later on. When Moses refused the mission to go to Pharaoh and bring about the חידוש העולם, his staff was turned into a צרעת serpent, and his hand became afflicted with צרעת, to show that he had aborted his purpose in life.