With real food, you can overeat; you can be a glutton; you can make yourself sick. But at this feast, it's impossible to have too much of Jesus and the blessings he supplies. Are you feasting? Daily, like you do with real food? We must be! This Jesus also calls us to live for him. We are given his righteousness, and called to righteousness. So when Jesus told a parable about a king (God) inviting people to the royal wedding feast of his son, he mentioned an interesting character. There was one who responded to the invitation, but came without the proper wedding attire. He was thrown out. Forever. I believe this is the man who would like to claim the righteousness of Christ, but cares little for living in righteousness by the power of Christ. There's no fruit to show for his professed faith; he was a hypocrite. You can claim to feast all you want, but if the feast doesn't transform your life, you're not feasting on the real Jesus.
You no doubt, are a discerning eater. It won't take much for you to tell the difference between a pizza made with real mozzarella and a pizza made with soy cheese (what I eat). God is discerning as well. He knows the difference between a true believer in Jesus who loves him and longs to live for him and a hypocrite who can talk about gospel and Jesus all day, but who has no fruit. Are you feasting on the real thing?