HaShem wanted all Bnei Yisrael to stand upright with pride, see the amazing event of Matan Torah, and hear the sounds. Then, the incredible happened!
“Amazing! I can see!” cried the blind.
“I don’t believe it! I don’t need crutches anymore!” shouted the lame.
“No more hearing aids!” exclaimed the deaf.
In fact, Hashem cured Bnei Yisrael from all their handicaps.
“Thank you HaShem!” proclaimed Moshe. Yes, it was true! For over 80 years, the great leader Moshe was not able to speak clearly. At Mount Sinai, he became completely cured and from that moment until he departed from the world, Moshe was a magnificent speaker.