October 22, 2021, 2:00 pm
“And He [God] said [to Avraham] look to the heavens and count the stars if you are able to count them” (Bereshit 15:5). “And lest you lift up your eyes to the heavens and you see the sun and the moon and the stars, all the hosts of the heavens” (Devarim 4:19). “Rabban Gamliel had illustrations of the shapes of the moon on a tablet and on the upper wall of his chamber, which he showed to the potential witnesses [at the time of sanctification of the month] and he said ‘did you see like this or like this?’” (Mishnah Rosh Hashanah 2:8).
September 3, 2021, 2:00 pm