Now that we've learned some of the laws that Moshe heard from HaShem on Mount Sinai, let's back up and find out what happened one day before Matan Torah, the giving of the Torah. (That's how it goes in the parsha. The stories in the Torah aren't always told in the order in which they happened.)
HaShem asked his people if they were willing to accept the Torah. All together they replied eagerly: "NA'ASEH V'NISHMAH! We will do and then we will listen (try to understand)!" They agreed first to do everything and anything HaShem would command -- even though they didn't understand yet the meaning behind all the mitzvot. They knew that later, the meaning and purpose of the commandments might become clear. And if it turned out they couldn't figure out the reasons for the mitzvot? So what! They trusted that HaShem knew what's best for them.
(Have you ever been given a prescription for medicine, maybe for a bad cough or sore throat? Did you ask the doctor exactly what the medicine was made of and how it would work to make you better? Probably not. Chances are, you trusted your doctor, took the medicine and became healthy again! It's the same way with our "spiritual doctor" -- HaShem. He is the expert doctor in what makes our neshamot, our souls, healthy.)
When HaShem heard the Jews say "Na'aseh v'nishma," He sent down hundreds of thousands of malachim (angels) -- a malach for each Jew. Each malach carried two heavenly crowns, one for the word Na'aseh and one for Nishma. These beautiful crowns were placed on the Jews' heads as a wonderful gift from HaShem.
