Love and fear unite in avodah

אברהם הוליד את יצחק כו'.

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

The Sefas Emes opens with the verse the Midrash reads as a testimony that Avraham truly fathered Yitzchak.

כבר כתבנו בענין המאמר שהיו ליצני הדור אומרים מאבימלך כו'.

We have already written regarding the teaching that the scoffers of the generation were saying that [Sarah conceived] from Avimelech.

The Midrash relates that cynics claimed Yitzchak was really Avimelech's son, not Avraham's.

צר הקב"ה קלסתר פניו.

Hashem formed his facial features [to resemble Avraham].

Hashem made Yitzchak's face look exactly like Avraham's to silence the scoffers.

עדות יש שאברהם הוליד.

There is a testimony that Avraham begot [him].

The resemblance served as proof of Yitzchak's lineage from Avraham.

ופרשנו כי בירור אמיתת היראה הוא כשבאה מתוך האהבה.

And we explained that the clarification of the truth of yirah (fear/awe) is when it comes from within ahavah (love).

Genuine yiras Shomayim is verified specifically when it grows out of love.

וכן האהבה הבאה מתוך היראה.

And likewise the love that comes from within the fear.

And true love, in turn, is the kind that arises from awe.

כמ"ש הרמב"ן ז"ל שאהבה ויראה בכל הדברים המה מתנגדים זה לזה חוץ בעבודת השי"ת הם מתאחדים.

As the Ramban wrote, that in all matters love and fear are opposites to one another, except in the service of Hashem, where they unite.

Normally love and fear pull in opposite directions, but in avodas Hashem they fuse into one.

והנה היראה צריך עדות כי היא יותר נגיעת האדם שירא מעונש.

Now, fear requires testimony, because it is more bound up with a person's self-interest (negiah) — that he fears punishment.

Yirah needs verification because it can be merely self-interested fear of punishment.

אבל אהבה היא אות אמת.

But love is a true sign.

Love, by contrast, is inherently a sign of genuine, selfless attachment.

ולכן הי' עדות שזו היראה של יצחק באה מתוקף אהבה והיא יראה של אמת.

Therefore there was testimony that this fear of Yitzchak came from the force of love, and it is a true fear.

The resemblance testified that Yitzchak's trait of yirah was rooted in Avraham's love — hence authentic.

דיש ב' יראות כידוע.

For there are two types of fear, as is known.

There is lower fear (of punishment) and higher fear (awe of Hashem's greatness).

לכן אמרו הליצנים כי לגרמייהו עביד.

Therefore the scoffers said that he acts for his own sake (le-garmaihu avid).

The cynics claimed Yitzchak's fear was merely self-serving, not true yirah.

וזהו מעשה האומות ולא מדריגה המיוחדת לבני ישראל.

And this is the conduct of the nations, not the level unique to Bnei Yisrael.

Self-interested fear is the way of the nations; Bnei Yisrael are meant for the higher fear.

והעדות ע"ז שאברהם הוליד כו'.

And the testimony to this is that "Avraham begot" [him].

Yitzchak's likeness to Avraham proved his fear flowed from Avraham's love, not from self-interest.

לכן כתיב וישב יצחק ויחפור כו' ויקרא להן שמות כו'.

Therefore it is written: "And Yitzchak returned and dug [the wells]... and he called them names." (Bereishis 26:18)

Yitzchak re-dug Avraham's wells and restored their original names.

כלומר שחזר לעורר האהבה ע"י היראה כמ"ש לקמן באורך.

That is to say, he returned to awaken the love by means of the fear, as will be explained at length later.

Re-digging the wells symbolizes Yitzchak using his trait of yirah to reawaken Avraham's love.

ועל ב' אלו מצווין לקרוא בכל יום ואהבת והי' אם שמוע בחי' אברהם ויצחק.

And concerning these two we are commanded to recite each day "ve-ahavta" and "ve-haya im shamoa" — the aspects of Avraham and Yitzchak.

The two paragraphs of Shema correspond to love (Avraham) and fear (Yitzchak), recited daily to unite both.

ובוהי' אם שמוע יש שכר ועונש והוא מדריגת יצחק לכן היו הברכות ביד יצחק:

And in "ve-haya im shamoa" there is reward and punishment, which is the level of Yitzchak; therefore the blessings were in Yitzchak's hand.

The second paragraph, with its reward and punishment, embodies Yitzchak's trait of fear — which is why the power of blessing was entrusted to him.

Summary: True yiras Shomayim must be verified, since fear can be merely self-interested fear of punishment, whereas love is an inherent sign of genuine attachment. The Torah's testimony that "Avraham begot Yitzchak" — Yitzchak's face mirroring Avraham's — proves that Yitzchak's fear sprang from Avraham's love and was therefore authentic. As the Ramban teaches, love and fear, normally opposites, unite in avodas Hashem; the two paragraphs of Shema embody Avraham's love and Yitzchak's fear, and because blessing flows from the fusion of both, the blessings were placed in Yitzchak's hand.