Machshavaמחשבה

The Spiritual Significance of Forty in Teshuva

Sources explore the number forty as a threshold for spiritual purification and return to God, drawing on biblical narratives of Moshe's encounters at Sinai and the Flood, and on rabbinic teachings about the soul's structure and the process of repentance.

וּמַה הִיא הַתְּשׁוּבָה

7 sources · 6 verified

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What the sources say

The forty days of flood rain are explicitly linked by the Shem MiShmuel (Noach 6:11) to the lashes of forty that serve as purgation, grounded in the Maharal's principle that a human being contains forty parts of the soul — thirty-nine surrounding an innermost point — so that once the thirty-nine external parts are purified, the innermost point is automatically purified along with them.

This inner structure illuminates the repeated biblical pattern in which forty days and forty nights mark a period of radical transformation: the flood that blots out corrupted creation (Bereishit 7:4) and Moshe's two extended ascents on Sinai (Shemot 24:18 and Devarim 9:9) all operate within that same span, suggesting that forty is the complete measure required to work through every dimension of the self.

The broader framework of return presupposed by these sources is articulated by the Sha'arei Teshuvah (1:1–2), which teaches that God has prepared a path for human beings to ascend from the degradation of their deeds — implying that the process of purification follows a structure built into creation itself.

Source 1 · Tanach
Verified

Exodus 24:18

שמות כ״ד:י״ח

Exodus 24:18

Moshe enters the cloud on Sinai for forty days and forty nights. The verse is central to the idea that forty marks a threshold of deep spiritual encounter and purification through withdrawal from ordinary life.

וַיָּבֹ֥א מֹשֶׁ֛ה בְּת֥וֹךְ הֶעָנָ֖ן וַיַּ֣עַל אֶל־הָהָ֑ר וַיְהִ֤י מֹשֶׁה֙ בָּהָ֔ר אַרְבָּעִ֣ים י֔וֹם וְאַרְבָּעִ֖ים לָֽיְלָה׃ {פ}

Moses went inside the cloud and ascended the mountain; and Moses remained on the mountain forty days and forty nights.

Source 2 · Tanach
Verified

Deuteronomy 9:9, 9:18,

דברים ט׳:ט׳

Deuteronomy 9:9

Moshe twice fasts and prays for forty days and nights after the sin of the Golden Calf. This is one of the clearest biblical models of teshuva through sustained fasting, pleading, and renewal.

בַּעֲלֹתִ֣י הָהָ֗רָה לָקַ֜חַת לוּחֹ֤ת הָֽאֲבָנִים֙ לוּחֹ֣ת הַבְּרִ֔ית אֲשֶׁר־כָּרַ֥ת יְהֹוָ֖ה עִמָּכֶ֑ם וָאֵשֵׁ֣ב בָּהָ֗ר אַרְבָּעִ֥ים יוֹם֙ וְאַרְבָּעִ֣ים לַ֔יְלָה לֶ֚חֶם לֹ֣א אָכַ֔לְתִּי וּמַ֖יִם לֹ֥א שָׁתִֽיתִי׃

I had ascended the mountain to receive the tablets of stone, the Tablets of the Covenant that GOD had made with you, and I stayed on the mountain forty days and forty nights, eating no bread and drinking no water.

Source 3 · Tanach
Verified

Genesis 7:4, 7:12, 8:6-7

בראשית ז׳:ד׳

Genesis 7:4

The Flood lasts forty days and nights, and later Noah waits forty more days before sending out the raven and dove. These verses become a foundational biblical pattern for forty as a period of cleansing, transformation, and preparation for a new beginning.

כִּי֩ לְיָמִ֨ים ע֜וֹד שִׁבְעָ֗ה אָֽנֹכִי֙ מַמְטִ֣יר עַל־הָאָ֔רֶץ אַרְבָּעִ֣ים י֔וֹם וְאַרְבָּעִ֖ים לָ֑יְלָה וּמָחִ֗יתִי אֶֽת־כׇּל־הַיְקוּם֙ אֲשֶׁ֣ר עָשִׂ֔יתִי מֵעַ֖ל פְּנֵ֥י הָֽאֲדָמָֽה׃

For in seven days’ time I will make it rain upon the earth, forty days and forty nights, and I will blot out from the earth all existence that I created.”

Source 4 · Tanach
idea-grounded

Numbers 13:25, 14:33-34

Numbers 14:34

The spies explore the land for forty days, and the generation is decreed to wander forty years. The passage links forty with a complete process of testing, failure, and eventual rectification.

Source 5 · Rishonim
Verified

Sha'arei Teshuvah 1:1-2

שערי תשובה א׳:א׳-ב׳

Sha'arei Teshuvah 1:1-2

Rabbeinu Yonah introduces teshuva as a profound return that requires self-examination and disciplined effort. The work is highly relevant for reading forty as a spiritually intensive season of return.

הַשַּׁעַר הָרִאשׁוֹן – בְּבֵאוּר הַתְּשׁוּבָה וְעִקָּרֶיהָ. מִן הַטּוֹבוֹת אֲשֶׁר הֵיטִיב הַשֵּׁם יִתְבָּרַךְ עִם בְּרוּאָיו, כִּי הֵכִין לָהֶם הַדֶּרֶךְ לַעֲלוֹת מִתּוֹךְ פַּחַת מַעֲשֵׂיהֶם וְלָנוּס מִפַּח פִּשְׁעֵיהֶם, לַחְשֹׂךְ נַפְשָׁם מִנִּי שַׁחַת וּלְהָשִׁיב מֵעֲלֵיהֶם אַפּוֹ, וְלִמְּדָם וְהִזְהִירָם לָשׁוּב אֵלָיו כִּי יֶחֶטְאוּ לוֹ, לְרֹב טוּבוֹ וְיָשְׁרוֹ כִּי הוּא יָדַע יִצְרָם, שֶׁנֶּאֱמַר (תהלים כה, ח): "טוֹב וְיָשָׁר ה' עַל כֵּן יוֹרֶה חַטָּאִים בַּדָּרֶךְ", וְאִם הִרְבּוּ לִפְשֹׁעַ וְלִמְרוֹד וּבֶגֶד בּוֹגְדִים בָּגָדוּ, לֹא סָגַר בַּעֲדָם דַּלְתֵי תְּשׁוּבָה, שֶׁנֶּאֱמַר (ישעיה לא, ו): "שׁוּבוּ לַאֲשֶׁר הֶעְמִיקוּ סָרָה". וְנֶאֱמַר (ירמיה ג, כב): "שׁוּבוּ בָּנִים שׁוֹבָבִים אֶרְפָּה מְשׁוּבֹתֵיכֶם". וְהֻזְהַרְנוּ עַל הַתְּשׁוּבָה בְּכַמָּה מְקוֹמוֹת בַּתּוֹרָה, וְהִתְבָּאֵר, כִּי הַתְּשׁוּבָה מְקֻבֶּלֶת גַּם כִּי יָשׁוּב הַחוֹטֵא מֵרֹב צָרוֹתָיו, כָּל שֶׁכֵּן אִם יָשׁוּב מִיִּרְאַת הַשֵּׁם וְאַהֲבָתוֹ, שֶׁנֶּאֱמַר (דברים ד, ל): "בַּצַּר לְךָ וּמְצָאוּךָ כֹּל הַדְּבָרִים הָאֵלֶּה בְּאַחֲרִית הַיָּמִים וְשַׁבְתָּ עַד ה' אֱלֹהֶיךָ וְשָׁמַעְתָּ בְּקוֹלוֹ". וְהִתְבָּאֵר בַּתּוֹרָה, כִּי יַעֲזֹר ה' לַשָּׁבִים כַּאֲשֶׁר אֵין יַד טִבְעָם מַשֶּׂגֶת וִיחַדֵּשׁ בְּקִרְבָּם רוּחַ טְהוֹרָה לְהַשִּׂיג מַעֲלַת אַהֲבָתוֹ, שֶׁנֶּאֱמַר (דברים ל, ב): "וְשַׁבְתָּ עַד ה' אֱלֹהֶיךָ וְשָׁמַעְתָּ בְקֹלוֹ כְּכֹל אֲשֶׁר אָנֹכִי מְצַוְּךָ הַיּוֹם אַתָּה וּבָנֶיךָ בְּכָל לְבָבְךָ וּבְכָל נַפְשֶׁךָ". וְאוֹמֵר בְּסוֹף הָעִנְיָן (דברים ל, ו): "וּמָל ה' אֱלֹהֶיךָ אֶת לְבָבְךָ וְאֶת לְבַב זַרְעֶךָ" – לְהַשִּׂיג אַהֲבָתוֹ. וְהַנְּבִיאִים וְהַכְּתוּבִים דִּבְּרוּ תָּמִיד עַל דְּבַר הַתְּשׁוּבָה, עַד כִּי בָּאוּ עִקְּרֵי הַתְּשׁוּבָה כֻּלָּם מְפֹרָשִׁים בְּדִבְרֵיהֶם כַּאֲשֶׁר יִתְבָּאֵר. וְדַע, כִּי הַחוֹטֵא כַּאֲשֶׁר יִתְאַחֵר לָשׁוּב מֵחַטָּאתוֹ יִכְבַּד עָלָיו מְאֹד עָנְשׁוֹ בְּכָל יוֹם, כִּי הוּא יוֹדֵעַ כִּי יָצָא הַקֶּצֶף עָלָיו וְיֵשׁ לוֹ מָנוֹס לָנוּס שָׁמָּה, וְהַמָּנוֹס הוּא הַתְּשׁוּבָה, וְהוּא עוֹמֵד בְּמִרְדּוֹ וְהִנּוֹ בְּרָעָתוֹ, וּבְיָדוֹ לָצֵאת מִתּוֹךְ הַהֲפֵכָה, וְלֹא יָגוּר מִפְּנֵי הָאַף וְהַחֵמָה, עַל כֵּן רָעָתוֹ רַבָּה. וְאָמְרוּ רַבּוֹתֵינוּ זִכְרוֹנָם לִבְרָכָה עַל הָעִנְיָן הַזֶּה (קהלת רבה ז, לב) מָשָׁל לְכַת שֶׁל לִסְטִים שֶׁחֲבָשָׁם הַמֶּלֶךְ בְּבֵית הָאֲסוּרִים, וְחָתְרוּ מַחְתֶּרֶת, פָּרְצוּ וַיַּעֲבֹרוּ וְנִשְׁאַר אֶחָד מֵהֶם. בָּא שַׂר בֵּית הַסֹּהַר וְרָאָה מַחְתֶּרֶת חֲתוּרָה וְהָאִישׁ הַהוּא עוֹדֶנּוּ עָצוּר, וַיַּךְ אוֹתוֹ בְּמַטֵּהוּ. אָמַר לוֹ: קְשֵׁה יוֹם! הֲלֹא הַמַּחְתֶּרֶת חֲתוּרָה לְפָנֶיךָ וְאֵיךְ לֹא מִהַרְתָּ הִמָּלֵט עַל נַפְשֶׁךָ?

In explanation of repentance and its principles Among the good things which God, may He be blessed, has bestowed upon His creations is the path which He prepared for them to ascend from the baseness of their actions, to escape the trap of their inequities, to hold their souls back from destruction and to remove His anger from upon them. Because of His goodness and uprightness, He has taught them and warned them to return to Him when they sin against Him - for He understands their nature, as it is stated (Psalms 25:8), "Good and upright is the Lord; therefore He shows sinners the way." [Even] if they greatly sin and rebel and act like treacherous betrayers - He does not close the doors of repentance to them, as it is stated (Isaiah 31:6), "Return, to Him to whom they have been so shamefully false." It is [also] stated (Jeremiah 3:22), "Turn back, O rebellious children, I will heal your afflictions." We are warned about repentance in several places in the Torah. It is explained that repentance is accepted even when the sinner repents because of his many troubles - how much more so [will it be accepted] if he returns because of fear or love of God - as it is stated (Deuteronomy 4:30), "When you are in distress because all these things have befallen you and, in the end, return to the Lord your God and obey Him." It is explained in the Torah that God will help those who repent beyond what their natural ability would allow; and that He renews a pure spirit within them, to reach great heights in His love - as it is stated (Deuteronomy 30:2), "And you return to the Lord your God, and you and your children heed His command with all your heart and soul, just as I enjoin upon you this day." Further, it is stated about the body of the matter (Deuteronomy 30:6), "Then the Lord, your God, will circumcise your heart and the hearts of your offspring," to acquire love for Him. And the Prophets and Writings constantly speak on the subject of repentance, such that the principles of repentance are all explained in their words, as will be explained. Know that the punishment for the sinner who delays repenting of his sin will grow much heavier for him every day. For he knows that [God's] wrath has gone forth against him and that he has an escape route from it - that escape being repentance - yet he still remains rebellious and stays within his evil. Even though it is within his power to leave from within the disorder, he does not fear the anger nor the rage. Thus, his evil is great (see also Midrash Kohelet [Kohelet Rabbah 7:15], which relates a parable illustrating this concept).

Source 6 · Rishonim
Verified

Mishneh Torah, Repentance 2:1-2

משנה תורה, הלכות תשובה ב׳:א׳-ב׳

Mishneh Torah, Repentance 2:1-2

Rambam defines teshuva as leaving sin, regretting the past, and verbally confessing before God. While not centered on the number forty, it provides the halakhic frame in which extended periods of self-scrutiny acquire meaning.

וּמַה הִיא הַתְּשׁוּבָה. הוּא שֶׁיַּעֲזֹב הַחוֹטֵא חֶטְאוֹ וִיסִירוֹ מִמַּחֲשַׁבְתּוֹ וְיִגְמֹר בְּלִבּוֹ שֶׁלֹּא יַעֲשֵׂהוּ עוֹד שֶׁנֶּאֱמַר (ישעיה נה ז) "יַעֲזֹב רָשָׁע דַּרְכּוֹ" וְגוֹ'. וְכֵן יִתְנַחֵם עַל שֶׁעָבַר שֶׁנֶּאֱמַר (ירמיה לא יט) "כִּי אַחֲרֵי שׁוּבִי נִחַמְתִּי". וְיָעִיד עָלָיו יוֹדֵעַ תַּעֲלוּמוֹת שֶׁלֹּא יָשׁוּב לְזֶה הַחֵטְא לְעוֹלָם שֶׁנֶּאֱמַר (הושע יד ד) "וְלֹא נֹאמַר עוֹד אֱלֹהֵינוּ לְמַעֲשֵׂה יָדֵינוּ" וְגוֹ'. וְצָרִיךְ לְהִתְוַדּוֹת בִּשְׂפָתָיו וְלוֹמַר עִנְיָנוֹת אֵלּוּ שֶׁגָּמַר בְּלִבּוֹ:

What constitutes Teshuvah? That a sinner should abandon his sins and remove them from his thoughts, resolving in his heart, never to commit them again as [Isaiah 55:7] states "May the wicked abandon his ways...." Similarly, he must regret the past as [Jeremiah 31:19] states: "After I returned, I regretted." [He must reach the level where] He who knows the hidden will testify concerning him that he will never return to this sin again as [Hoshea 14:4] states: "We will no longer say to the work of our hands: `You are our gods.'" He must verbally confess and state these matters which he resolved in his heart.

Source 7 · Hasidic
Verified

Shem MiShmuel, Noach 6:11

Shem MiShmuel, Noach 6:11

The Zohar teaches that the forty days of the flood correspond to the forty lashes of punishment; the Maharal explains that a person has forty components of the soul, and that thirty-nine of these surround an innermost point which itself completes forty, such that when thirty-nine components are purified through thirty-nine lashes, the inner point is automatically purified as well, and this is why the Torah specifies forty lashes—because after sin all forty components became corrupted, yet when the thirty-nine are cleansed, the innermost point becomes clean of itself, whereas among the nations whose inner point derives from the root of the serpent, only the complete forty lashes apply, which is why Egypt received forty plagues.

איתא בזוה"ק שארבעים יום שירד המבול הוא כענין מלקות ארבעים ויש להבין דא"כ ל"ט יום מבעי לי' סכום שהוא משלים לארבעים, ולמה ירד ארבעים שלימים, ונראה עפ"י מ"ש המהר"ל בספר גו"א בטעם דאתי הלכתא וגרעא לחדא, כי יש באדם ארבעים חלקי הנפש וע"כ נגמר צורתו בארבעים יום ול"ט מהם סובבים לנקודה הפנימית שבו שהוא משלים לארבעים ונקודה זו בפני עצמה טהורה היא אלא כל זמן שהוא מחוברת לטמא הרי היא טמא שכל המחובר לו הרי הוא כמוהו, וע"כ כתיב בתורה ארבעים מכות שבאמת אחר שחטא נתקלקל כל הארבעים חלקים אך כאשר נטהרו הל"ט חלקים ע"י ל"ט מכות נטהר ממילא גם נקודה הפנימית, עכת"ד, והנה זה ניחא בישראל דהפנימית שלהם טוב אבל באומה"ע שגם הפנימית שלהם משורש נחש אין ענין ל"ט מכות אלא ארבעים שלימים, וע"כ במצרים נמי לקו ארבעים מכות מה"ט: