ת"ר מעשה ברבן יוחנן בן זכאי שהיה רוכב על החמור והיה מהלך בדרך ור' אלעזר בן ערך מחמר אחריו אמר לו רבי שנה לי פרק אחד במעשה מרכבה אמר לו לא כך שניתי לכם ולא במרכבה ביחיד אלא א"כ היה חכם מבין מדעתו אמר לו רבי תרשיני לומר לפניך דבר אחד שלמדתני אמר לו אמור מיד ירד רבן יוחנן בן זכאי מעל החמור ונתעטף וישב על האבן תחת הזית אמר לו רבי מפני מה ירדת מעל החמור אמר אפשר אתה דורש במעשה מרכבה ושכינה עמנו ומלאכי השרת מלוין אותנו ואני ארכב על החמור מיד פתח ר"א בן ערך במעשה המרכבה ודרש וירדה אש מן השמים וסיבבה כל האילנות שבשדה פתחו כולן ואמרו שירה מה שירה אמרו (תהלים קמח, ז) הללו את יי מן הארץ תנינים וכל תהומות עץ פרי וכל ארזים הללויה נענה מלאך מן האש ואמר הן הן מעשה המרכבה עמד רבן יוחנן ב"ז ונשקו על ראשו ואמר ברוך יי אלהי ישראל שנתן בן לאברהם אבינו שיודע להבין ולחקור ולדרוש במעשה מרכבה יש נאה דורש ואין נאה מקיים נאה מקיים ואין נאה דורש אתה נאה דורש ונאה מקיים אשריך אברהם אבינו שאלעזר בן ערך יצא מחלציך
The Rabbis taught: It once happened that Rabban Yochanan the son of Zakkai was riding on a donkey and going on the road, and Rabbi Elazar the son of Arach was He said to him, "Master, Teach me one chapter of the deed of the chariot." He said to him, "Have I not taught you such, 'And not regarding the chariot with one [student], except for if he is smart and understands on his own [when given the summary]. He said to him, "Rabbi, Allow me to say before you one thing that you have taught me." He said to him, "Say." Immediately, Rabban Yochanan descended from upon the donkey, wrapped himself up, and sat on a rock under an olive tree. He said to him, "Rabbi, for what reason did you descend from upon the donkey?" He said, "Is it possible that you are expounding the deed of the chariot, and the [Divine] presence is with us, and the servicing angels are accompanying us, and I should ride on a donkey?" Immediately, Rabbi Elazar the son of Arach started with the deed of the chariot and expounded [it], and fire came down from the heavens and surrounded all of the trees in the field. The [angels] all opened [their mouths] and said praise. What praise did they say? "Praise Hashem from the land, sea monsters and all depths... fruit trees and all cedars... Praise Hashem (Psalms 148:7-14)." One angel spoke up from the fire and said, "This (what they were learning) is the deed of the chariot." Rabban Yochanan the son of Zakkai stood and kissed him on the head, and said, "Blessed is Hashem, the G-d of Israel, who gave a son to Abraham our father who knows how to understand, to investigate, and to expound the deed of the chariot. There is one who expounds well but does not uphold well [and there is one who] upholds well but does not expound well. You expound well and uphold well. Praiseworthy are you, Abraham our forefather, for Elazar the son of Arakh has exited from your loins.".
ת"ר ארבעה נכנסו בפרדס ואלו הן בן עזאי ובן זומא אחר ורבי עקיבא אמר להם ר"ע כשאתם מגיעין אצל אבני שיש טהור אל תאמרו מים מים משום שנאמר (תהלים קא, ז) דובר שקרים לא יכון לנגד עיני בן עזאי הציץ ומת עליו הכתוב אומר (תהלים קטז, טו) יקר בעיני יי המותה לחסידיו בן זומא הציץ ונפגע ועליו הכתוב אומר (משלי כה, טז) דבש מצאת אכול דייך פן תשבענו והקאתו אחר קיצץ בנטיעות רבי עקיבא יצא בשלום
he Rabbis taught: There were four who entered the Orchard (a reference to the Garden of Eden), and they are - Ben Azzai, Ben Zoma, Acher (Elisha Ben Avuya) and Rabbi Akiva. Rabbi Akiva said to them:"When you reach near the pure marble stones, do not say 'Water, water'," Because it is said, "A speaker of lies shall not abide before my eyes (Psalms 101:7)." Ben Azzai glanced and died, and upon him the verse says, "It is precious in the eyes of Hashem, the death to his pious (Psalms 116:15)." Ben Zoma glanced and was hurt (mentally; he went insane), and upon him the verse says, "Honey you have found- eat [only] your fill, lest you become satisfied of it and regurgitate it (Proverbs 25:16)." Acher chopped down saplings [ie. he became a heretic]. Rabbi Akiva emerged in peace.
The ancient Saba [an old man] stood up and said [to Rabbi Shimon bar Yochai], "Rabbi, Rabbi! What is the meaning of what Rabbi Akiva said to his students, "When you come to the place of pure marble stones, do not say, 'Water! Water!' lest you place yourselves in danger, for it is said, 'He who speaks untruths shall not stand before My eyes.' But it is written, "There shall be a firmament between the waters and it shall separate between water [above the firmament] and water [below the firmament]"(Genesis 1:6). Since the Torah describes the division of the waters in to upper and lower, why should it be problematic to mention this division? Furthermore, since there are [in fact]upper and lower waters, why did Rabbi Akiva warn them, "do not say, 'Water! Water!'"
The Holy Lamp [a title accorded to Rabbi Shimon bar Yochai] replied, "Saba, it is proper that you reveal this secret that the chevraya [Rabbi Shimon's circle of disciples] have not grasped clearly."
The ancient Saba answered, "Rabbi, Rabbi, Holy Lamp. Surely the pure marble stones are the letter yud -- one the upper yudof the letter aleph, and one the lower yud of the letter aleph [an aleph in script is formed by an upright yud at the top to the right, and an upside-down yud at the bottom to the left, joined by a vav, the diagonal line between them]. Here there is no spiritual impurity; only pure marble stones, and so there is no separation between one water and the other; they form a single unity from the aspect of the Tree of Life, which is the vav in the midst of the letteraleph. In this regard it states, "[lest he put forth his hand] and if he take of the Tree of Life [and eat and live forever]…(Gen. 3:22)
The meaning of Rabbi Akiva's exhortation is that the Sages should not declare that there are two types of water. Since there are not [two types of water] one would be causing a separation. This is the meaning of "do not say, 'water, water'" -- do not say that there are two types of water, lest you endanger yourself because of the sin of separation. For this reason the old man asked two questions, both of which are real questions: "There shall be a firmament between the waters and it shall separate…" (Genesis 1:6). Thus there are two types of water and a separation between them. In this case, does it not appear to be permissible to refer to two types of water? Even more problematic is that the Torah itself states, "It shall separate between water and water" -- the water above the firmament and the water below the firmament. This is a complete separation.
The marble stones represent the letter yud.
The old man asked a second question -- the waters are in fact of two types: water of the firmament and water below the firmament [in rivers, lakes and seas]. Why then did Rabbi Akiva exhort them not to say "water, water, lest they endanger themselves?" On the contrary; it should be permitted to mention two types of water, for this is no worse than the language used by the Torah, and this is also the situation in fact!
Now Rabbi Shimon did not wish to explain this matter himself; he wanted his disciples to hear it from the old man. The old man explained that each of the marble stones represents the letter yud. As we have explained elsewhere this means a yudat the beginning, and a yud at the end, according to the mystical explanation of "I am first and I am last" (Isaiah 44:6).The first yud represents chochma, and the second yud represents malchut, which is also chochma according to the mystical explanation of the light that returns from below to above (called or chozer). The upper yud is the yud of the Tetragrammaton (Yud-Hei-Vav-Hei) while the lower yud is the yud of the Name Alef-Dalet-Nun-Yud.
The latter is the concept of "female waters" (Mayin Nukvin), and the former the concept of "male waters" (MayinDechurin). They are called "female waters" because they receive from below, from the performance of the commandments, and through them a person has the ability to affect the higher worlds so that the light will shine forth and become clothed in them, as in a palace. Thus the light that is elicited [by the performance of the commandments is like] a king in his palace.
These are also the keys to the inner and outer aspects. The inner aspect is the light of the Tetragrammaton, which undoubtedly descends as or yashar from above to below. The outer aspect is that which returns according to the mystical explanation of or chozer. This is the meaning of the statement in regard to the sefirot "from below to above, and from above to below," as explained elsewhere. This is signified by the top and the bottom yuds of the aleph. This is also the secret of the intertwining (shiluv) of the two Names --Yud-Alef-Hei-Dalet-Vov-Nun-Hei-Yud -- with the upper yud at the beginning and the lower yud at the end.