The number 21 symbolizes the completion of a trial period – linked to both spiritual resistance and divine redemption.
In biblical numerology, 21 is often associated with 3 (divine perfection) multiplied by 7 (spiritual perfection), giving the number a special intensity. This combination can point to completed testing—either in the form of rebellion against God or as a maturation process leading to redemption. In the book of Daniel (Daniel 10:13), the prince of Persia resisted the angel for 21 days, illustrating intense spiritual opposition. But right after these 21 days, the breakthrough came, and Daniel received his vision. The number can thus be seen as a symbol that a period of testing is completed before divine intervention—resistance is followed by redemption. In Jewish tradition, three weeks (21 days) – known as "Bein HaMetzarim" (between troubles) – mark the mourning period from the 17th of Tammuz to Tisha B'Av (9th of Av), commemorating the siege of Jerusalem and the destruction of the Temple. This period highlights the symbolism of numbers: 21 days of sorrow culminating in catastrophe, yet in Jewish eschatology also carrying hope for future restoration. Kabbalistic tradition links the number 21 to the Hebrew letter shin (ש), which has a numerical value of 300 but is the 21st letter of the Hebrew alphabet. Shin is associated with divine fire and transformation, resonating with the understanding of 21 as a number of profound change.*