Chastisement as Hidden Blessing
עוד במדרש אין מפסיקין בקללות משום דכתיב מוסר ה' בני אל תמאס
Furthermore, the Midrash teaches that we do not pause in the middle of the curses when reading them in the Torah, because it is written, "My son, do not despise the chastisement of Hashem" (Mishlei 3:11).
When the curses of the Tochachah are read in shul, the reader does not stop partway through, and the Midrash roots this in the verse warning us not to despise Hashem's chastisement. The curses themselves are a form of mussar from Hashem.
כי הקב"ה נתן כל הנהגות בנ"י ע"פ התורה
For the Holy One, Blessed is He, established all the conduct and governance of Bnei Yisrael according to the Torah.
All of the affairs and guidance of Bnei Yisrael flow through the Torah, as established by Hashem.
ולכן מקבלין בנ"י הברכה וגם הקללה ע"פ התורה
Therefore Bnei Yisrael receive both the blessing and also the curse by way of the Torah.
Since everything comes through the Torah, both blessing and curse reach Bnei Yisrael through that same channel of Torah.
ואין עונש איש ישראל כמו עונש הרשעים אבל גם הוא תורה ולכן נק' מוסר ה'
The punishment of a Jew is not like the punishment of the wicked; rather, even his punishment is Torah, and that is why it is called "the chastisement of Hashem."
A Jew's suffering is fundamentally different from the punishment of the wicked: for a Jew it is itself Torah, which is precisely why Scripture calls it "the chastisement of Hashem" rather than mere punishment.
וכמו בקבלת הטובה אין השפע בא לבנ"י ע"י אמצעיים רק מהקב"ה בעצמו וזה אות השבת כמ"ש במ"א
Just as in the receiving of good, the shefa does not come to Bnei Yisrael through intermediaries but from the Holy One, Blessed is He, Himself, and this is the sign of Shabbos, as is explained elsewhere,
Just as the goodness and shefa Bnei Yisrael receive comes straight from Hashem with no middleman — which is the inner meaning of Shabbos — so too the lesson continues into the realm of punishment.
כמו כן העונשין של בנ"י לא נמסרו לשליח
so too the punishments of Bnei Yisrael are not handed over to any messenger.
Because Bnei Yisrael's blessings come directly from Hashem, their punishments likewise are not delegated to any angel or agent but come from Hashem Himself.
וז"ש אנכי נותן אנכי היא התורה וכ"כ עמו אנכי בצרה
This is the meaning of "I am giving" (Devarim 11:26) — the word "Anochi," "I," alludes to the Torah; and so too it is written, "I am with him in his distress" (Tehillim 91:15).
The word "Anochi" ("I am giving") hints at the Torah and at Hashem's direct involvement, paralleled by the verse "I am with him in his distress," showing Hashem is present even in the hardship.
וע"ז כתי' אוהבו שחרו מוסר
Concerning this it is written, "One who loves him seeks him out with chastisement" (Mishlei 13:24).
Because the chastisement comes from Hashem out of love, Scripture says that one who truly loves seeks out the other even with rebuke.
שגם המוסר יש בו אור ושחר
For even within the chastisement there is light and dawn.
Even the painful mussar contains hidden light and the promise of a coming dawn; it is not mere darkness.
היפוך מ"ש חושך שבטו שונא בנו
This is the opposite of what is written, "One who withholds his rod hates his son" (Mishlei 13:24).
Withholding correction out of false mercy is actually a sign of hatred, the reverse of loving chastisement.
וע"ז אמר דהע"ה שבטך ומשענתך המה ינחמוני
Concerning this Dovid HaMelech said, "Your rod and Your staff, they comfort me" (Tehillim 23:4).
Dovid HaMelech expresses that the very rod of discipline becomes a source of comfort, because it comes from Hashem's love.
וכל העונשים של בנ"י להעביר ליכלוך העונות כדאי' בזוה"ק שלח ה' ממית כו' וכי שמא דא ממית רק שהוא ממית הסט"א וחשכות הגוף להאיר הנשמה ע"ש
And all the punishments of Bnei Yisrael come to remove the filth of their sins, as is stated in the Zohar HaKadosh on Parashas Shelach: "Hashem sends death..." — and does this Name bring death? Rather, it brings death to the Sitra Achra and to the darkness of the body, in order to illuminate the neshamah; see there.
Punishment serves to scrub away the grime of sin; the Zohar explains that the Divine Name does not destroy the person but destroys the Sitra Achra and the body's darkness so the neshamah can shine.
וזה ג"כ פי' הכ' ראה אנכי נותן כו'
And this too is the meaning of the verse, "See, I am giving..." (Devarim 11:26):
The verse "See, I am giving" is now read in this deeper light, as referring to the giving of the Torah itself.
פי' שיכולין לקבל התורה דרך הברכה כשזוכין לכך
the explanation is that they are able to receive the Torah by way of blessing, when they merit such,
When Bnei Yisrael are worthy, they absorb the Torah pleasantly, through the channel of blessing.
ואם לאו יצטרכו לקבל התורה ע"י העונשין ח"ו
and if not, they will need to receive the Torah by way of the punishments, Heaven forfend.
But if they are not worthy, then, Heaven forbid, the Torah must reach them through the harder channel of punishment.
ולכן אין מפסיקין בקללות כי סופם לבא לידי ברכה כי הוא מוסר ה' וכמ"ש אשר יאהב ה' יוכיח פי' בעצמו:
Therefore we do not pause in the middle of the curses, for their ultimate end is to come to blessing, for it is the chastisement of Hashem, as it is written, "For whom Hashem loves, He rebukes" (Mishlei 3:12) — meaning that He rebukes Himself, directly.
This is why the reader does not break in the middle of the curses: their endpoint is blessing, since it is all Hashem's loving chastisement, and the rebuke comes from Hashem directly out of love.
Summary: The Sfas Emes explains why we do not pause in the middle of reading the curses of the Tochachah: because they are "the chastisement of Hashem," a form of Torah given in love, whose ultimate end is blessing. Just as the shefa and goodness that reach Bnei Yisrael come directly from the Holy One, Blessed is He, with no intermediary — the secret of Shabbos — so too their punishments are never delegated to any messenger but come from Hashem Himself. The very word "Anochi" hints both at the Torah and at Hashem's direct presence, as in "I am with him in his distress," and as the Zohar teaches, the affliction does not destroy the Jew but destroys the Sitra Achra and the darkness of the body so the neshamah can shine. Thus suffering for a Jew is itself Torah, a loving rebuke that scrubs away the filth of sin. "See, I am giving" therefore teaches that the Torah is received through blessing when one merits it, and otherwise, Heaven forbid, through the channel of punishment — yet either way it remains the chastisement of the One who loves us.