Two are better than one/ two heads are better than one/ four eyes see more than two
Better to be together with another person than to be alone. Also: an activity is preferable when done in cooperation with someone else rather than by a person acting alone.
("Two are better than one, because they have a good reward for their labor" — Ecclesiastes 4:9; and likewise: "Two are better than one" — Rabbi Meir, when he would see a person leaving alone for the road, would call out to him: "Go in peace, man of death" (because when a person sets out alone, he endangers his life). When there were two, he would call out to them: "Peace to you, quarrelers" (since they are liable to quarrel on the road). When there were three, he would call to them: "Peace to you, people of peace" (for if two of them quarrel on the road, there is someone who can make peace between them) — Ecclesiastes Rabbah 4; and likewise: "I am going there anyway and I’ll take you with me. Two are better than one, fool!" — Mendele Mocher Sforim, Mas'ot Banimim HaShlishi, Koach; and likewise: "My uncle wanted to swim / in order to float steadily / learned swimming by correspondence / from a well-known lifeguard / when at last he entered the sea / within seconds he disappeared / two rushed to him at once / two drowning men are better than one" — Dani Senderson / Yoo Yah)
Translation
Expression (Hebrew)
טוֹבִים הַשְּׁנַיִם מִן הָאֶחָד
Definition (Hebrew)
עָדִיף לִהְיוֹת בְּצַוְותָּא עִם אָדָם נוֹסָף מֵאֲשֶׁר לִהְיוֹת לְבַד. אוֹ: עֲדִיפָה פְּעֻלָּה הַנַּעֲשֵׂית בְּשִׁתּוּף כּוֹחוֹת עִם הָאַחֵר עַל פְּנֵי פְּעֻלַּת הָאָדָם כְּבוֹדֵד.
("טוֹבִים הַשְּׁנַיִם מִן הָאֶחָד אֲשֶׁר יֵשׁ לָהֶם שָׂכָר טוֹב בַּעֲמָלָם"- קֹהֶלֶת ד ט, וְכֵן:"טוֹבִים הַשְּׁנַיִם מִן הָאֶחָד "- ר' מֵאִיר כְּשֶׁהָיָה רוֹאֶה אָדָם יוֹצֵא יְחִידִי לַדֶּרֶךְ הָיָה קוֹרֵא לוֹ:"לֵךְ לְשָׁלוֹם בַּעַל מִיתָה" (כִּי כְּשֶׁאָדָם יוֹצֵא יְחִידִי הוּא מְסַכֵּן אֶת חַיָּיו), שְׁנַיִם, הָיָה קוֹרֵא עֲלֵיהֶם:"שָׁלוֹם לָכֶם בַּעֲלֵי מְרִיבָה" (מִכֵּיוָן שֶׁהֵם עֲלוּלִים לָרִיב בַּדֶּרֶךְ), שְׁלוֹשָׁה, קָרָא לָהֶם:"שָׁלוֹם לָכֶם בַּעֲלֵי שָׁלוֹם" ( שֶׁאִם שְׁנַיִם מֵהֶם יְרִיבוֹ בַּדֶּרֶךְ יֵשׁ מִי שֶׁיַּשְׁלִים בֵּינֵיהֶם)- קֹהֶלֶת רַבָּה ד, וְכֵן:"הֲרֵי אֲנִי הוֹלֵךְ לְשָׁם בְּלָאו הָכִי וְאֶקָּחֵךְ עִמִּי. טוֹבִים הַשְּׁנַיִם מִן הָאֶחָד, טִפֵּשׁ!"- מֶנְדֵּלֵי מו"ס,מַסְּעוֹת בַּנִּימִים הַשְּׁלִישִׁי,כֹּחַ, וְכֵן:""דּוֹד שֶׁלִּי רָצָה לִשְׂחוֹת/ כְּדֵי לָצוּף קָבוּעַ/ לָמַד שְׂחִיָּה בְּהִתְכַּתְּבוּת/ אֵצֶל מַצִּיל יָדוּעַ/ כְּשֶׁנִּכְנַס סוֹף סוֹף לַיָּם/ תּוֹךְ שְׁנִיּוֹת הוּא נֶעֱלַם/ שְׁנַיִם קָפְצוּ אֵלָיו מִיָּד/ טוֹבְעִים הַשְּׁנַיִם מִן הָאֶחָד"- דָּנִי סֶנְדֶּרְסוֹן/ יוּ יָה)