Chazal say, “A maidservant at the sea saw more than Yechezkel ben Buzi,” meaning, everyone reached tremendous high levels of kedusha at Kriyas Yam Suf. However, Matan Torah was different.
When Hashem gave the Torah, Klal Yisroel were divided according to their different levels. Moshe was closer than Aharon, Aharon was closer than the Kohanim, and the rest of Klal Yisroel weren’t permitted to leave their place to go up onto Har Sinai.
Why were they separated according to their level at Matan Torah, but there were no divisions at Kriyas Yam Suf?
The Rebbe of Tchortkov zt”l answers that the amount of Torah a person can acquire is dependent on his level. Some people know more than others. However, when it comes to emuna, everyone has the potential to reach the highest levels. With simple faith, even simple people can be great like the greatest tzaddikim.
~ R’ Elimelech Biderman