Finite effort, infinite blessing

בפסוק ויזרע יצחק בארץ ההוא וימצא בשנה ההיא מאה שערים ויברכהו ה'.

On the pasuk, "And Yitzchak sowed in that land, and he found in that year a hundredfold (me'ah she'arim), and Hashem blessed him." (Bereishis 26:12)

The Sefas Emes will read the "hundred measures" Yitzchak found, followed by Hashem's blessing, as two distinct levels of brachah.

כי התיקון בבחי' עולם ושנה הוא במדה וגבול.

For the rectification (tikkun) in the dimensions of "olam" (space) and "shanah" (time) is within measure and limit.

Whatever a person accomplishes within the bounded world of space and time is itself bounded — it has a defined measure.

ואלה המאה שערים שבכח האדם לתקן בעולם כדאיתא במדה"נ פרשת לך שנמסר ביד האדם מאה מפתחין דברכאין.

And these are the "hundred measures" that lie within a person's power to rectify in the world, as it is brought in the Midrash HaNe'elam, Parshas Lech [Lecha], that a hundred keys of blessings were handed over to a person.

The "me'ah she'arim" represent the hundred "keys of blessing" entrusted to a person — the full, finite measure of what human avodah can achieve within the natural world.

וכאשר האדם מתקן זאת אז ויברכהו ה' בבחי' נפש.

And when a person rectifies this, then "Hashem blessed him" — in the aspect of the soul (nefesh).

Once a person completes the measured tikkun within his power, Hashem grants a further, inner blessing on the level of the soul.

והוא למעלה מבחי' מאה שערים כדאיתא בזוה"ק ברכה דלעילא לא פחות מאלף.

And this is above the aspect of the "hundred measures," as it is brought in the holy Zohar: a blessing from above is no less than a thousand.

Hashem's own bracha far exceeds the hundred keys of human effort; a blessing drawn from the upper world begins at "a thousand," a measure beyond human reach.

והוא בחי' אין מספר:

And it is the aspect of "without number" (ein mispar).

Ultimately Hashem's blessing belongs to the realm of the infinite — beyond all measure and counting — which is granted only after a person has done his finite part.

Summary: Yitzchak's "hundredfold" represents the bounded measure of tikkun within human power — the hundred "keys of blessing" entrusted to a person in the world of space and time. But once a person completes that finite avodah, Hashem adds "and Hashem blessed him" — an inner blessing of the soul that comes from above, beyond a thousand, ultimately without number, infinitely surpassing what human effort alone can attain.