This lecture, delivered by Rabbi Elyahu Kin on 01/28/2021, elaborates on the need and importance of being receptive to constructive criticism. Rabbi Kin gives a brief introduction on the difference between Vaccination, Inoculation, and Immunization to further illustrate how many people have become immune to criticism, whereas the Vaccine that allows one to mature properly requires the willingness to welcome criticism and make the necessary changes in one's behavior. Rabbi Kin also explains why many of the ills and symptoms afflicting this generation are indicative that we are close to the Messianic era.