We come to the end of the book of Shemot. When we finish a book of the Torah, tradition invites us to say together: Chazak, chazak, venitchazek — “Be strong, be strong, and let us strengthen one another.”   It is an ancient formula, but there are moments when these words carry particular weight. Perhaps never more than now do we feel the need to say them with real conviction: to be strong for ourselves, strong for our communities, and strong for a humanity that seems to despe