Speech as Builder
לא יחל דברו
"He shall not profane his word" (Bamidbar 30:3).
The piece opens with the Torah's command that a person must not violate his own spoken vow.
אמרו חז"ל הוא אינו מיחל ואחרים מוחלין לו
Chazal taught: he himself cannot annul his vow, but others can annul it for him.
Chazal note the precise wording: a person cannot release himself from a vow, yet a beis din or chacham can release him.
הענין הוא כי האדם נקרא מדבר
The matter is as follows: man is called "the speaker" (medaber).
The Sfas Emes roots this in man's defining title — medaber, the speaking being.
וזה היתרון שיש לו על כל הברואים וצריך להיות הדיבור מנהיג לכל האדם להיות נמשך אחרי הדיבור
This is the advantage he holds over all other creatures, and speech must serve as the guide for the entire person, so that he is drawn after the word.
Speech is what elevates man above all creation, and it should govern the whole person, with everything he does following from his word.
כי דיבור נק' על שם ההנהגה שהוא עיקר האדם שע"ז חל שם שמים כמ"ש ויפח באפיו כו' לנפש חי' לרוח ממללא
For "speech" (dibbur) is named for its role of leadership, which is the essence of man, and it is upon this that the Name of Heaven rests, as it is written, "And He blew into his nostrils" (Bereishis 2:7) — "a living soul," which Targum renders as "a speaking spirit."
Dibbur denotes leadership and is the core of man; this is where the Divine rests, as the verse describes Hashem breathing into Adam a living, speaking soul.
ונעשה בנין מדיבור האדם
And from the speech of man a structure is built.
A person's words actually construct a real spiritual edifice.
ובגמ' הנודר כאלו בנה במה כו' פירש"י בזמן איסור הבמות
In the Gemara it states that one who makes a vow is as though he built a private altar (bamah), and Rashi explains that this refers to the period when private altars were forbidden.
The Gemara compares making a vow to building a private altar, and Rashi places this in the era when such altars were prohibited.
ומ"מ נראה כמו שבמות הי' להם זמן היתר וזמן איסור
Nonetheless, it appears that just as the private altars had a time when they were permitted and a time when they were forbidden,
The Sfas Emes draws out that, like those altars, vows have a permitted time and a forbidden time.
כמו כן יש בנפשות שהנדר ושבועה מותר להם דהיינו צדיקים כדאיתא במד' אם יש בך מדות הללו כו'
so too among souls there are those for whom the vow and the oath are permitted, namely the tzaddikim, as is brought in the Midrash: "If these qualities are within you, [then make vows]."
Correspondingly, some souls — the tzaddikim — are fit to make vows and oaths, as the Midrash conditions it on having the proper qualities.
ולהם ניתן זה הבנין כמ"ש ותגזר אומר ויקם
To them this structure was given, as it is written, "You shall decree a matter and it shall be fulfilled for you" (Iyov 22:28).
For such people the vow becomes a building tool, matching the verse that a tzaddik's decree comes to pass.
ושבועה נק' קיימא בתרגום
And an "oath" (shevuah) is rendered in Targum as kayama, an enduring establishment,
The word for oath, shevuah, is translated by Targum as kayama, something firmly established and lasting.
שנעשה מזה קומה ובנין
for from it a stature and a structure are made.
This shows that an oath creates an enduring stature and structure.
והנה לכל אדם יש עולם ושיעור קומה בפ"ע ולכן הבנין שנבנה בדיבורו לא יחל
Now every person has his own world and his own measure of stature, and therefore the structure built through his word "shall not be profaned."
Since each person possesses his own world and spiritual measure, the edifice his words build must not be profaned.
אבל החכם עוקר נדר מעיקרו כי כח החכם למעלה בעולם וקומה שלמעלה מזה הנודר
But the chacham uproots the vow from its very source, for the power of the chacham reaches higher — to a world and a stature loftier than that of the one who took the vow.
The chacham, however, can uproot a vow entirely because his spiritual reach stands above the world and stature of the one who vowed.
ולכן אחרים מוחלין לו
And therefore others can annul it for him.
That higher vantage point is precisely why others, but not the person himself, can annul his vow.
כי עיקר הכוונה שהאדם לא יחל דיבורו להיות הדיבור שליט על האדם שהוא המנהיג וכח השורש שלו כנ"ל:
For the essential intent is that a person should not profane his word, so that speech rules over the man, since it is the leader and the power of his root, as explained above.
The bottom line is that one must not profane his word, letting speech rule as the leader and root-force of the entire person.
Summary: The Sfas Emes builds this piece on the verse "He shall not profane his word" and Chazal's teaching that a person cannot annul his own vow, though others can. He explains that man is defined as the medaber, the speaker, and that speech is his essence and the seat of the Divine within him, so that his words actually construct a real spiritual edifice. Just as private altars had permitted and forbidden times, vows are fitting for the tzaddikim, whose words build an enduring stature — reflected in the Targum's rendering of "oath" as kayama, an enduring establishment. Because each person has his own world and measure, the structure his word creates may not be profaned by himself. Only the chacham, whose spiritual reach stands above that of the one who vowed, can uproot the vow from its root, which is why others can annul it for him, all so that speech may rule as the leader and root-force of the whole person.