Yitzchak's judgment is deeper chessed

אברהם הוליד את יצחק.

"Avraham begot Yitzchak." (Bereishis 25:19)

The Sefas Emes opens with the parsha's first verse, asking why the Torah stresses that Avraham — the middah of chessed (kindness) — was the father of Yitzchak, who represents the opposite middah.

כי יצחק אע"פ שהוא בחי' מדה"ד מ"מ הכל לזכות בנ"י כדאיתא בזוה"ק יצחק נטל היכלא דזכות דכתיב ויתן לך האלקים בדין אם תהי' ראוי.

For although Yitzchak is the aspect of middas hadin (the attribute of strict judgment), nevertheless it is all in order to bring merit (zechus) to Bnei Yisrael, as it is brought in the Zohar: Yitzchak took the "chamber of merit" (heichala dezechu), as it is written, "And the Elokim shall give to you" (Bereishis 27:28) — in judgment, if you will be worthy.

Yitzchak embodies din, yet the very purpose of din is to give Bnei Yisrael genuine merit. When good comes "in judgment," conditioned on worthiness, it is earned rather than given as a handout.

כדאיתא במשנה רצה הקב"ה לזכות את ישראל לפיכך הרבה להם תורה ומצות כו' למען צדקו כו'.

As it is taught in the Mishnah: "The Holy One wished to grant merit to Yisrael, therefore He gave them abundant Torah and mitzvos… in order to make them righteous (l'maan tzidko)." (Makkos 3:16)

The abundance of mitzvos is itself an act of love, for it gives Bnei Yisrael endless opportunities to earn their reward through their own deeds rather than receive it as charity.

כי זה הזכות שיהיו זוכין במעשיהם אל החסד.

For this is the "merit" — that they should earn the chessed through their own deeds.

The point of din is to let a person reach Hashem's kindness by way of his own actions, so that the chessed becomes truly his.

דמאן דאכיל דלאו דילי' בהית לאסתכולי בי'.

For "one who eats that which is not his own is ashamed to look upon it" (nahama dekisufa — the bread of shame).

A gift one has not earned carries shame, like eating someone else's food. Earned reward, by contrast, can be enjoyed without embarrassment.

ולכן עיקר הברכה נמסר ליצחק כי לאברהם נעשה נסים באור כשדים ובמלכים.

Therefore the essence of the berachah was entrusted to Yitzchak; for to Avraham, miracles were done — in Ur Kasdim and against the kings.

Avraham's path was one of open miracles, where Hashem intervened directly from above. The blessing of earned, internalized kindness, however, belonged to Yitzchak.

אבל ביצחק כתיב וילך הלוך וגדל.

But regarding Yitzchak it is written, "And he went on, growing greater and greater (haloch v'gadel)." (Bereishis 26:13)

Yitzchak's greatness came through a gradual, natural process of growth from within, not through sudden miracles from without.

ויברכהו ה'.

"And Hashem blessed him." (Bereishis 26:12)

The berachah of Yitzchak was one that settled into his ordinary efforts and labors.

היינו להיות הברכה שולט במעשיו.

That is, that the berachah should rule within his deeds.

Yitzchak's blessing was for Hashem's berachah to permeate and govern his own actions and handiwork.

וכתיב בידך לגדל ולחזק לכל.

And it is written, "In Your hand is to make great and to give strength to all." (Divrei Hayamim I 29:12)

The Sefas Emes distinguishes two kinds of Divine bestowal in this posuk: "to make great" and "to give strength."

הגדולה הוא מדת אברהם אבל לחזק הוא בחי' יד החזקה שהקב"ה מחזק את האדם כמו שהוא להיות הברכה שולט במעשה ידיו.

"Greatness" (gedulah) is the middah of Avraham, but "to give strength" (l'chazek) is the aspect of the "strong hand" (yad hachazakah), whereby the Holy One strengthens the person as he is, so that the berachah rules within the work of his hands.

"Greatness" reflects Avraham's overflowing chessed bestowed from above. "Strengthening" reflects Yitzchak's path: Hashem empowers a person within his own natural state, so the blessing flows through his own deeds.

וזה חסד גדול ביותר.

And this is an even greater chessed.

To be empowered to earn the blessing oneself is a deeper kindness than simply receiving it, for it spares one the shame of an unearned gift.

לכן כתיב אברהם הוליד את יצחק לומר שמדת יצחק הוא ג"כ חסד.

Therefore it is written, "Avraham begot Yitzchak," to teach that the middah of Yitzchak is also chessed.

This answers the opening question: the verse links Yitzchak to Avraham to reveal that Yitzchak's din is itself a form of chessed — the kindness of letting a person earn his reward.

וכל זה הסדר נוהג בכל פרט שמתחלה הקב"ה עושה עמו חסד ואח"כ זוכה ביותר אל החסד במעשה ידיו עד שבא אל בחי' האמת מדת יעקב:

And this entire order applies to every individual: at first the Holy One does chessed with him, and afterward he merits even more to the chessed through the work of his own hands, until he arrives at the aspect of truth, the middah of Yaakov.

This progression mirrors every person's spiritual path: first an initial gift of chessed (Avraham), then earning that chessed through one's own deeds (Yitzchak), until one reaches the integrated truth of Yaakov, in which the blessing is fully one's own.

Summary: Though Yitzchak embodies middas hadin (strict judgment), the Torah's statement "Avraham begot Yitzchak" reveals that Yitzchak's din is itself a deeper chessed. Avraham received open miracles from above, but Yitzchak's blessing was the power to have Hashem's berachah rule within his own deeds — so that he earns the kindness rather than receiving it as an unearned gift that carries shame. This mirrors every person's path: an initial gift of chessed, then earning chessed through one's own efforts, until arriving at the truth of Yaakov.