Two paths of avodah: love and gevurah
Avos · ahavah · gevurah · yissurim · teshuvah
במדרש גיל יגיל בזמן שנולד צדיק גילה אחר גילה.
In the Midrash: "He will surely rejoice (gil yagil)" (Mishlei 23:24) — when a tzaddik is born, there is joy upon joy (gilah achar gilah).
The Sefas Emes opens with the Midrash that the birth of a tzaddik brings a doubled joy, which he will explain through the double nature of the toldos (generations) of the Avos.
כי ואלה מוסיף על הראשונים כי מקודם הי' תולדות הגשמיי בלבד.
For "and these" (v'eileh) adds to what preceded, for beforehand there were only physical generations (toldos).
The connecting word "v'eileh" hints that something is added: before the Avos, offspring meant only physical continuation.
אבל מאבות התחיל להיות תולדות בבחי' הרוחניות להנחיל כח הקדושה לזרעו אחריו.
But from the Avos there began to be generations in the aspect of the spiritual — to bequeath the power of kedushah to one's seed after him.
With the Avos, a new kind of "offspring" began: the transmission of holiness, passing spiritual power down to descendants.
וזהו גילה אחר גילה כשהצדיק נולד.
And this is "joy upon joy" when the tzaddik is born.
The doubled joy at a tzaddik's birth corresponds to these two dimensions of offspring — physical and spiritual.
כי בתולדות יש שמחה.
For in (ordinary) offspring there is joy.
Any birth brings a measure of joy — the joy of physical continuity.
ובזרע צדיקים יש ב' שמחות מב' התולדות בגשמיי ורוחניי.
But in the offspring of tzaddikim there are two joys, from the two kinds of generation — physical and spiritual.
When a tzaddik is born there is a double simchah, because his birth carries both physical and spiritual continuation.
ובפ' וכל הבארות כו' חפרו ע"א בימי אברהם אביו סתמום פלשתים כו' וישב יצחק ויחפור.
And in the passage: "And all the wells… that the servants of Avraham his father had dug in the days of Avraham his father, the Pelishtim had stopped up… and Yitzchak returned and dug" (Bereishis 26:15-18).
He turns to the wells dug in Avraham's days, stopped up by the Pelishtim, which Yitzchak then re-dug.
פי' בימי הם ההארות אשר חידש אברהם והיא בבחי' החסד ואהבת ה'.
The explanation: "in the days of (Avraham)" refers to the illuminations that Avraham innovated, which are in the aspect of chesed and ahavas Hashem (love of Hashem).
"The days of Avraham" are the spiritual illuminations he pioneered — the path of chesed and loving Hashem.
ובהארות אלו מצאו מים.
And in these illuminations they found water.
Avraham's path of love drew forth living water — spiritual vitality and connection.
ואלה הבארות נסתמו אח"כ.
And these wells were stopped up afterward.
That original wellspring of Avraham's path became blocked over time.
לכן הי' צריך יצחק לחדש דרך הגבורה ויראת ה'.
Therefore Yitzchak had to innovate the path of gevurah and yiras Hashem (fear of Hashem).
Because the path of love became blocked, Yitzchak introduced a complementary path — gevurah and yiras Shomayim.
כי בוודאי כל ההסתם הי' כדי שיצטרך יצחק לחדש דרך שלו.
For surely the entire stopping-up was so that Yitzchak would need to innovate his own path.
The blocking of the wells was by design — to make room for Yitzchak's distinct avodah of fear and gevurah.
וכן הוא גם בפרט כל איש ישראל כשמתפעל לפעמים במדה אחת.
And so it is also, in particular, with every Yid, when he is sometimes aroused in one middah.
The same pattern works in each person's avodah: at times he is inspired through one particular trait or approach.
אח"כ נופל מזאת המדריגה כדי שיצטרך לחפש דרך אחר ועי"ז מתקן כל המדות.
Afterward he falls from that level, so that he should need to seek another path, and through this he rectifies all the middos.
The inevitable falling from an inspired level is purposeful: it forces a person to find new paths, and so over time he refines all of his middos rather than just one.
וכל דרכי האבות הי' הכל רק עצות בעבור בנ"י איך למצוא עבודת ה' כמ"ש במד' אברהם חידש זקנה יצחק יסורים.
And all the ways of the Avos were entirely counsels (eitzos) for the sake of Bnei Yisrael — how to find avodas Hashem, as the Midrash says: "Avraham innovated old age (ziknah), Yitzchak innovated suffering (yissurim)."
The Avos forged their distinct paths as guidance for all future Yidden in serving Hashem — Avraham through the dimension of "old age," Yitzchak through suffering.
פי' זקנה הוא כבוד כמ"ש הדר זקנים שיבה.
The meaning: "ziknah" (old age) is honor (kavod), as it is written: "the splendor of elders is gray hair" (Mishlei 20:29).
Avraham's "old age" represents the dimension of honor and dignity that Hashem bestows.
והוא שעי"ז הכבוד והחסד שהקב"ה עושה עם האדם ונותן לו חכמה ודעת.
And it is that through this honor and chesed that Hashem does with a person, giving him chochmah and da'as —
Hashem grants a person honor, kindness, wisdom and understanding —
שזקן הוא שקנה חכמה.
— for "zaken" means one who has acquired wisdom (kanah chochmah).
A "zaken" is defined by Chazal as one who has acquired wisdom, tying old age to attained chochmah.
ע"י אלה הטובות יתבייש אדם מעצמו וישוב לפני הבורא.
Through these good things a person becomes ashamed of himself and returns before Hashem.
When a person receives such goodness from Hashem yet feels unworthy of it, the resulting shame moves him to do teshuvah — this is Avraham's path.
והוא דרך האהבה.
And this is the path of love (ahavah).
Being drawn back to Hashem through gratitude and shame at His goodness is the path of love that Avraham pioneered.
ויצחק הוא בחי' הגבורה.
And Yitzchak is the aspect of gevurah.
Yitzchak, by contrast, embodies gevurah — the path that comes through yissurim (suffering).
ואם שבאמת אין זוכין לתורה רק ע"י יסורין כמאמר הגמ'.
And although in truth one merits Torah only through suffering, as the Gemara states (Berachos 5a).
Chazal teach that the crown of Torah is acquired specifically through yissurim — Yitzchak's path.
אעפ"כ דרך אברהם קודם והוא טוב לאדם.
Nevertheless, the path of Avraham comes first, and it is better for a person.
Even so, the path of love (Avraham) is preferable and is the one to pursue first, if possible.
כמאמר חז"ל טובה מרדות א' בלבו של אדם כו' ע"י הבושה מרוב הטובה שהקב"ה משפיע לו ולא יצטרך ליסורין כנ"ל:
As Chazal said: "better one (pang of) self-reproach in a person's heart (than many lashes)" (Berachos 7a) — through the shame from the abundance of good that Hashem bestows upon him, so that he will not need suffering, as above.
A single inner pang of self-reproach — born of shame at Hashem's overflowing goodness — accomplishes the teshuvah of Avraham's path of love, sparing a person the need for the harsher path of yissurim.
Summary: The birth of a tzaddik brings "joy upon joy" because the Avos began a new kind of offspring — transmitting spiritual kedushah alongside physical continuity. The wells illustrate two complementary paths of avodah: Avraham pioneered chesed and ahavas Hashem (drawing forth living water), and when those wells were "stopped up" (by design), Yitzchak innovated gevurah and yiras Hashem. So too every Yid is inspired in one middah, then falls, so as to seek new paths and thereby refine all his middos. The Avos forged these as eitzos for Bnei Yisrael: Avraham's path of "old age"/honor leads a person to teshuvah through shame at Hashem's abundant goodness (the path of love), while Yitzchak's path comes through yissurim. Though Torah is acquired through suffering, the path of love is preferable and comes first — a single pang of self-reproach can spare one the need for suffering.