papertyger,
by relying on Jesus-the living bread day by day, he wasn’t demanding that we re-enact the Last Supper everyday...He means HE is the bread, even when we’re without earthly bread. HE sustains us—spiritually. To KNOW Jesus personally IS life. He gives us eternal life. He’s the bread that never perishes.
Think about what you would do on a desert island with nobody else around you. No priests, no church, no one. Your days are numbered. Food is running out, there’s hardly fresh water. All you have is a pocket-sized New Testament with Christ promising that He is the Bread of life and that you must eat of it in order to be saved. And you read and read and read about this truth.
What would that mean to you without any “communion” to fall back on? Is it any less relevant now that you’re on a desert island about to face death and the judgment seat of Christ himself?
Why would I think about a far fetched hypothetical designed to do nothing but read a New Testament I've already read hundreds of times?