'Modern Orthodoxy' is one of those labels that gets bandied about in the Jewish world but is seldom defined. Does it really exist? Ought it? Do we believe in it? Is it a lesser Orthodoxy? Occasionally congregants reprimand me, “What you’re doing isn’t Modern Orthodox!” Do they know better? Can modernity and orthodoxy really coexist? We look at the challenges and the aspirations of Orthodox Jews in a modern world.