Literally, this means that Moshe had to repeat precisely what Hashem told him to tell the Jewish nation regarding the preparations for matan Torah. "No less and no more." He shouldn’t add or subtract anything.
Torah for Everyone
Chazal (Kesubos 63a) tells us that when Kalba Savua's daughter married Reb Akiva, who was an am ha'aretz (ignorant in Torah) he made a neder and forbade his daughter and son-in-law from benefiting and from receiving anything of his vast wealth. When Reb Akiva became a gadol and had 24,000 students, Kalba Savua asked him to be matir his neder. Reb Akiva asked him, "If you knew that your son-in-law would become a talmid chacham, would you have made the neder and banned them from your wealth?" Kalba Savua said that he wouldn't have made the neder. With this "פתח", opening, Reb Akiva redeemed him from the neder.
Tosfos asks a question about the פתח, the opening. It didn't existent when Kalba Savua made the neder since Reb Akiva was still unlearned in Torah. It was something that occurred afterwards, and this is called נולד, born. The rule is that נולד, born situations, which weren't in existent when the neder was being made, aren't sufficient for a פתח, to free someone from his neder! Tosfos answers that since Reb Akiva was going to study Torah, it was very likely that he would become great in Torah. Therefore, the excuse and the "opening" (פתח) existed when he made the vow.
Reb Akiva was forty years old and didn't know the alef beis. What was his chance of becoming a talmid chacham? The answer is that he had a lot of potential because he had a strong desire to grow in Torah. When there is a yearning and a desire to succeed in Torah, anyone, at any age, can make great strides in Torah.
It states (Shemos 19:17) ההר בתחתית ויתיצבו, "They stood at the bottom of the mountain." Beis Aharon (Rosh Chodesh Sivan) explains that this refers to people at a very low level. He writes, "Everyone can receive the Torah, no matter who he is, even if he is at the lowest level."
About matan Torah, Rashi (Shemos 19:6) writes יותר ולא פחות לא, "Not less and not more." The Chasam Sofer (Drashos 264:) says that יותר לא means that no one is greater than a person who studies Torah. פחות לא means that no one is too small to receive the Torah.
The Chasam Sofer (Drashos, Shavuos 5562) writes, "The Torah wasn't given to individuals, rather it was given to the entire Jewish nation... so everyone will have a portion in Torah... Therefore, every Yid can be equally joyous on Shavuos... The Torah was given... when we first left the slavery of Mitzrayim. We weren't worthy then for matan Torah. This was to tell us that there are no barriers, and we shouldn't lose hope of receiving our portion in Torah. Even if one is at a very low level, he is equal to the greatest."
Reb Leibele Eiger (Toras Emes, Yisro) explains that the story of matan Torah is written after Yisro's conversion. This is to teach us that matan Torah is for everyone. No one should think that because he is on a low level, matan Torah isn't for him. If Yisro, who used to be...
