Mordechai the steadfast tzaddik defeats Amalek

איש יהודי במדרש איתא שנדמה לאברהם שגייר גיורים דכתיב ורבים כו' מתיהדים כו'.

"A Jewish man (ish Yehudi)" — in the Midrash it is brought that he resembled Avraham, who converted gerim, as it is written, "and many… were becoming Jews (misyahadim)" (Esther 8:17).

The Midrash compares Mordechai to Avraham: just as Avraham brought converts under the wings of the Shechinah, Mordechai too caused many to "become Jews," drawing them toward Hashem.

דכתיב אם מזרע היהודים מרדכי.

As it is written, "if Mordechai is of the seed of the Jews" (Esther 6:13).

Haman's advisors describe Mordechai as being "of the seed of the Jews," a phrase the Sefas Emes will read as alluding to his power to plant and produce new "seed."

פי' שהאדם עץ השדה.

The meaning is, "for man is the tree of the field" (Devarim 20:19).

The Torah likens a person to a tree. The Sefas Emes uses this image: a tzaddik, like a tree, can produce "seed" and bear fruit.

כמו שיש באילנות מזריע זרע. כן יש בצדיקים שבכחם להמשיך נפשות לזרוע צדיקים בארץ.

Just as there are trees that produce seed, so too there are among the tzaddikim those who have the power to draw down souls, to sow tzaddikim in the land.

Some tzaddikim possess a generative spiritual power — they can draw fresh neshamos into the world and "plant" righteous people, much as a fruit tree spreads its seed.

ופי' איש יהודי שעושה יהודים בעולם.

And the meaning of "ish Yehudi" is one who makes Jews in the world.

Mordechai is called "the Jewish man" because he actively produces Jews — bringing others to embrace Hashem and join Klal Yisrael.

וע"ז כתיב אור זרוע לצדיק שהצדיק יש בו אור להזריע ולהוליד פרי עץ חיים.

And about this it is written, "light is sown for the tzaddik" (Tehillim 97:11) — that the tzaddik has within him a light to sow and to bring forth the fruit of the Tree of Life.

"Or zarua la'tzaddik" — a sown light — hints that the tzaddik carries an inner light he can plant, bringing forth the fruit of the Eitz HaChaim: new souls and new closeness to Hashem.

והנה סיום הפסוק ולישרי לב שמחה זה בחי' בעלי תשובה שצריכים ליישר העקמומיות.

Now the end of the pasuk is "and gladness for the upright of heart" — this is the aspect of baalei teshuvah, who must straighten the crookedness.

The verse's second clause, about the "upright of heart," refers to baalei teshuvah, whose task is to straighten out the "crookedness" of their past — to rectify and realign themselves toward Hashem.

אבל למחיית עמלק צריכין לצדיק גמור מעיקרו כמ"ש איש יהודי הי'.

But for the eradication of Amalek, one needs a tzaddik gamur from his very root, as it is written, "there was an ish Yehudi."

Wiping out Amalek requires not a baal teshuvah but a complete tzaddik, righteous from his origin — and the verse's wording "there was a Jewish man" signals exactly such a person.

ואיתא כל מקום שכתיב הי' הוא מתחלתו ועד סופו שאין בו השתנות.

And it is brought: every place where "hayah" (there was) is written, it means from his beginning to his end, that there is no change in him.

The word "hayah" connotes constancy — a person who is the same throughout, without alteration. Mordechai was steadfastly righteous from start to finish.

וכ"כ לא יכרע ולא ישתחוה בלשון עתיד. כי הוא אין בו שינוי לעולם.

And likewise it is written, "he would not bow and would not prostrate himself" (Esther 3:2), in the future tense — for there is no change in him ever.

The Megillah uses the ongoing/future form for Mordechai's refusal to bow to Haman, expressing that his steadfastness was permanent and unchanging — a fixed quality of his being.

ושמעתי ממו"ז ז"ל ענין המוקפין חומה הם אותן שדברי תורה כחומה אצלם כמ"ש אום אני חומה.

And I heard from my grandfather, of blessed memory, regarding the matter of cities walled (mukafin chomah): they are those for whom words of Torah are like a wall, as it is written, "I am a wall" (Shir HaShirim 8:10).

The Sefas Emes cites the Chiddushei HaRim that "walled cities" (which read the Megillah on Shushan Purim) symbolize people for whom Torah is a protective "wall" — firm and immovable, like the verse "I am a wall."

ולכן תלהו ביהושע דכ' בי' לא ימוש כו'.

Therefore they made it depend on the time of Yehoshua, about whom it is written, "[the Torah] shall not depart [from your mouth]" (Yehoshua 1:8).

The halachah ties "walled cities" to those walled in Yehoshua's days — fitting, since Yehoshua is associated with the verse that Torah "shall not depart," the very quality of unwavering, wall-like steadfastness in Torah.

ולפי"ז יתכן לפרש כי הפרזים הם בעלי תשובות.

And according to this, it is fitting to explain that the "open-town" dwellers (perazim) are the baalei teshuvah.

If walled cities represent unwavering tzaddikim, then the unwalled "perazim" correspond to baalei teshuvah — those still working to build their "wall" of Torah and straighten their crookedness.

ולכן הם קודמין כי גדלה מעלת בעלי תשובה כו' אבל עיקר מפלת עמלק הי' צריך להיות על ידי מרדכי הצדיק:

And therefore they come first, for great is the level of baalei teshuvah… but the main downfall of Amalek had to come about through Mordechai the tzaddik.

The perazim (baalei teshuvah) read the Megillah first, reflecting the lofty level of those who return — "in the place where baalei teshuvah stand, complete tzaddikim cannot stand." Yet the actual defeat of Amalek required a tzaddik gamur from his root, Mordechai, whose unchanging steadfastness alone could uproot Amalek.

Summary: Mordechai, the "ish Yehudi," is likened to Avraham — a tzaddik with the generative power to "sow" Jews and draw new souls into the world, as "light is sown for the tzaddik." While the verse's "upright of heart" alludes to baalei teshuvah who straighten their crookedness, the eradication of Amalek demanded a complete tzaddik, unchanging from beginning to end, as the steady "hayah" and the future-tense refusal to bow attest. The walled cities represent those for whom Torah is an immovable wall, the open towns the baalei teshuvah who precede them in merit — yet only Mordechai the tzaddik, steadfast at his very root, could bring about Amalek's true downfall.