Bittul as the source of true offspring

במדרש אלה תולדות נח בית רשעים ישמד זה דור המבול אהל ישרים יפריח זה נח.

In the Midrash: "These are the generations of Noach" — "the house of the wicked shall be destroyed" (Mishlei 14:11), this refers to the generation of the Flood; "the tent of the upright shall flourish," this refers to Noach.

The Midrash contrasts the doomed "house" of the wicked generation of the Flood with the flourishing "tent" of the upright Noach, hinting that the difference lies in "house" versus "tent."

כבר כתבנו במ"א במ"ש רש"י עיקר תולדותיהם של צדיקים מצות ומעש"ט היינו ע"י שהצדיק מבטל הכל להעיקר ממילא עושה תולדות בעוה"ז דייקא וזה ענין השבת שמיני' מתברכין כל שיתא יומין וזה עדות השבת שכל המלאכות בטלים בו והוא הוא קיום כל מעשה בראשית והוא להודיע כי לא לאדם בכחו ועוצם ידו לעשות תולדות רק ע"י הביטול אליו ית'.

We have already written elsewhere on what Rashi said, that the primary "generations" (offspring) of tzaddikim are mitzvos and good deeds — meaning that because the tzaddik nullifies everything to the Essence, he automatically produces "offspring" specifically in this world; and this is the matter of Shabbos, from which all six days are blessed; and this is the testimony of Shabbos, that all labors cease on it, and it is the very sustaining of all of creation, and it is to make known that it is not by a person's own strength and the might of his hand that he produces offspring, but only through bittul (self-nullification) to Him, may He be blessed.

The true "offspring" of a tzaddik are his mitzvos, which come precisely from his bittul — nullifying himself completely to Hashem, the Essence. This is the lesson of Shabbos: by ceasing all melachah we testify that the world endures not through human power but through self-nullification to Hashem, and from that bittul of Shabbos the six working days draw their blessing.

ודור המבול שהיו גבורים וביתם שלום מפחד ונימוחו מעולם.

And the generation of the Flood, who were mighty men, and their house was "at peace, without fear" — yet they were wiped out of the world.

The Flood generation trusted in their own strength; their "house" felt secure and fearless. But precisely because they relied on themselves rather than on Hashem, they were utterly erased.

והצדיק שהי' ארעי אהל ישרים יפריח שכל מה שמבטל עצמו ועושה מלאכתו ארעי ותורתו קבע עי"ז יפריח ויגדל ויעשה פרי ואיתא בזוה"ק נח הוא שבת ובמ"א הארכתי לכן קצרתי:

And the tzaddik, who was "temporary" — "the tent of the upright shall flourish" — for everything by which a person nullifies himself and makes his work temporary (arai) and his Torah permanent (keva), through this he will flourish and grow and bear fruit; and it is taught in the holy Zohar that Noach is Shabbos, and elsewhere I have elaborated, therefore I have been brief here.

Noach is described as a "tent" — temporary and humble — because he made his worldly affairs secondary ("temporary") and his Torah primary ("permanent"). That very bittul is what makes him flourish and bear lasting fruit. The Zohar identifies Noach with Shabbos, the day of bittul and rest from which all blessing flows.

Summary: The true "offspring" of a tzaddik are his mitzvos, born of bittul — nullifying himself to Hashem, the Essence. The Flood generation relied on their own might and were destroyed, while Noach, who treated worldly work as temporary and Torah as permanent, flourished like a "tent of the upright." This is the lesson of Shabbos, with which Noach is identified: ceasing all labor testifies that the world is sustained not by human power but by self-nullification to Hashem.