The Gemara in Rosh Hashanah teaches us that we don’t use the horn from a cow for the mitzvah of tekias shofar as there is a rule ein kateigor naaseh saneigor, that a prosecutor can’t be a defender, and since we sinned with chet haeigel, we don’t want to do anything which may remind Hashem of our previous sins, therefore, we don’t use the horn of a cow. The question is, if so, how come we spend the entire day of Rosh Hashanah davening with our mouths, sadly many people use their mouths throughout the year for lashon hara, sheker etc. so why aren’t we scared that using out mouths will remind Hashem of our sins done with our mouths?
Have an amazing Shabbos
Kesiva vechasima tova
Moshe Harris