Wall Graffiti

Mending Wall by Robert Frost SOMETHING there is that doesn't love a wall,
That sends the frozen-ground-swell under it,
And spills the upper boulders in the sun;
And makes gaps even two can pass abreast.
The work of hunters is another thing:
I have come after them and made repair
Where they have left not one stone on stone,
But they would have the rabbit out of hiding,
To please the yelping dogs. The gaps I mean,
No one has seen them made or heard them made,
But at spring mending-time we find them there.
I let my neighbor know beyond the hill;
And on a day we meet to walk the line
And set the wall between us once again.
We keep the wall between us as we go.
To each the boulders that have fallen to each.
And some are loaves and some so nearly balls
We have to use a spell to make them balance:
"Stay where you are until our backs are turned!"
We wear our fingers rough with handling them.
Oh, just another kind of outdoor game,
One on a side. It comes to little more:
He is all pine and I am apple-orchard.
My apple trees will never get across
And eat the cones under his pines, I tell him.
He only says, "Good fences make good neighbors."
Spring is the mischief in me, and I wonder
If I could put a notion in his head:
"Why do they make good neighbors? Isn't it
Where there are cows? But here there are no cows.
Before I built a wall I'd ask to know
What I was walling in or walling out,
And to whom I was like to give offence.
Something there is that doesn't love a wall,
That wants it down!" I could say "Elves" to him,
But it's not elves exactly, and I'd rather
He said it for himself. I see him there,
Bringing a stone grasped firmly by the top
In each hand, like an old-stone savage armed.
He moves in darkness as it seems to me,
Not of woods only and the shade of trees.
He will not go behind his father's saying,
And he likes having thought of it so well
He says again, "Good fences make good neighbors."

בבא מציעא נ״ט ב:ג׳

חזר ואמר להם אם הלכה כמותי כותלי בית המדרש יוכיחו הטו כותלי בית המדרש ליפול גער בהם רבי יהושע אמר להם אם תלמידי חכמים מנצחים זה את זה בהלכה אתם מה טיבכם לא נפלו מפני כבודו של רבי יהושע ולא זקפו מפני כבודו של ר"א ועדיין מטין ועומדין

Bava Metzia 59b:3

He went and said “If the law is as I say the walls of the House of Study will prove it”; the walls of the House of Study inclined to fall. R. Yehoshua protested at them, saying to them “If scholars defeat each other in the law, how does it better you?” They did not fall because of the honor of R.Yehoshua and they did not straighten, because of the honor of R. Eliezer, and they still incline and stand....

שמות י״ד:כ״ב

וַיָּבֹ֧אוּ בְנֵֽי־יִשְׂרָאֵ֛ל בְּת֥וֹךְ הַיָּ֖ם בַּיַּבָּשָׁ֑ה וְהַמַּ֤יִם לָהֶם֙ חֹמָ֔ה מִֽימִינָ֖ם וּמִשְּׂמֹאלָֽם׃

Exodus 14:22

and the Israelites went into the sea on dry ground, the waters forming a wall for them on their right and on their left.

משנה סוכה א׳:א׳

(א) סֻכָּה שֶׁהִיא גְבוֹהָה לְמַעְלָה מֵעֶשְׂרִים אַמָּה, פְּסוּלָה. רַבִּי יְהוּדָה מַכְשִׁיר. וְשֶׁאֵינָהּ גְּבוֹהָה עֲשָׂרָה טְפָחִים, וְשֶׁאֵין לָהּ שְׁלֹשָׁה דְּפָנוֹת, וְשֶׁחַמָּתָהּ מְרֻבָּה מִצִּלָּתָהּ, פְּסוּלָה...

Mishnah Sukkah 1:1

(1) A sukkah which is more than twenty cubits high is not valid. Rabbi Judah validates it. One which is not ten handbreadths high, or which does not have three walls, or which has more sun than shade, is not valid...

ברטנורא על משנה סוכה א׳:א׳:ד׳

ושאין לה ג׳ דפנות. דכתיב בסכת בסכת בסוכות, שנים חסרים ואחד מלא, חד לסכך דפירוש סכה סכך, פשו להו תלתא לג׳ דפנות. אתיא הלכה למשה מסיני ובצריה לדופן חדא ואוקמיה אטפח, נשארו שתים כהלכתן ושלישית אפילו טפח...

Bartenura on Mishnah Sukkah 1:1:4

..And the following are unfit...one lacking three walls, [it being written (Leviticus 23:42): "In succoth," "in succoth," "in succoth," two defective (without the vav) and one plene (with the vav, having the effect of two): one, for the schach (the covering of the succah), the meaning of "succah" being "schach," leaving us with three, for three walls. A halachah to Moses on Sinai "comes and reduces one wall," setting it at a handbreadth. So that we are left with two of regulation size, and one, even a handbreadth.