The reason fasting is a sacred practice in every religion

HostWe spend so much of our lives thinking about what we're going to eat next. It's one of the biggest parts of being human. But for thousands of years, people have done the opposite on purpose. From the desert to the big city, almost every faith on the map says that skipping meals is a path to the holy. Why would being hungry help us find something deeper?

GuestIt's one of those rare things that shows up in almost every corner of the world. You find it in the freezing mountains and the hot sands. At its heart, fasting is about flipping a switch inside the body. When you stop eating for a set time, your brain starts to work in a new way. Most of the time, our bodies are busy breaking down food. It takes a lot of work. When that work stops, the energy goes somewhere else. Religions have known for a long time that a hungry body often leads to a very sharp mind.

HostBut surely that sharpness is just a nice way of saying you feel light headed? I know when I miss a meal, I just get cranky and tired. I can't imagine feeling closer to God when my stomach is growling.

GuestWell, that's the first wall everyone hits. You get that low feeling because your body is looking for its usual fuel. But if you push past that first day, something shifts. Your body goes into a kind of survival mode that's actually very alert. Back when we had to hunt for our food, being hungry meant you needed to be smart and quick to find your next meal. Your senses get keen. Sounds seem louder and colors can even seem brighter. Religions take that natural edge and use it for prayer. It's hard to let your mind wander when your body is that awake and focused on the present moment.

HostSo it's a bit of a trick to wake up the brain. But there's also this big idea of giving something up. It feels like a test of will.

GuestIt's the ultimate test. Think about it. Hunger is the loudest voice in our heads. It's a basic drive that we usually just obey without thinking. If you're hungry, you eat. Fasting is a way to say no to that voice. It's a way to prove that you're the boss of your own skin. The idea is that if you can say no to a piece of bread when you really want it, you might find the strength to say no to other things, like being mean or being selfish. It's like a workout for your self control. You're building a muscle that helps you choose how to act instead of just reacting to what your body wants.

HostThat makes sense for the person doing it alone. But so many of these traditions happen in huge groups. Whole cities will stop eating from sunrise to sunset. Why do we need everyone else to be hungry too?

GuestBecause nothing brings people together like a shared struggle. When everyone you know is feeling that same pull in their gut, you're not just neighbors anymore. You're a team. You're all waiting for the same sunset or the same feast. It turns a private act into a huge, invisible bond. It also levels the field. For a few weeks or a few days, the rich man and the poor man feel exactly the same thing. They're both waiting for that first bite of food. It reminds everyone that, underneath our clothes and our jobs, we're all just humans with the same basic needs.

HostI have heard that part of it's about feeling what it's like to be poor. But does skipping lunch for a day really help you understand what it's like to truly have nothing? It feels a bit like acting.

GuestIt might feel that way at first, but it's about building what I call gut knowledge. You can read a book about how hard it's to live without food, but your brain forgets those facts pretty fast. When your own stomach is cramping and you feel that hollow ache, you have a physical memory of it. It stays in your bones. Then, when you see someone on the street who hasn't eaten, you don't just feel sorry for them. You actually know what that feels like in your own body. It changes how you give to others. It moves from being a nice idea to being something you feel you must do.

HostSo it's not just about looking up at the sky. It's about looking at the person next to you. But I wonder about the rules. Some people can drink water, some can’t. Some skip one meal, some skip many. If the goal is just to be hungry, why does the way we do it matter so much?

GuestThe rules are like the walls of a garden. They give the act a shape. If you just decided to be hungry whenever you felt like it, it would just be a diet. But when you follow a set of rules that have been around for a thousand years, you're joining a long line of people. You're doing what your great-grandparents did. Those rules take the choice out of it. You're not choosing to skip lunch today because you want to lose weight. You're doing it because it's the time for it. That structure helps turn a physical feeling into a holy act. It takes the focus off yourself and puts it on the tradition.

HostIt's interesting that in a world where we can have any food we want at any time, we still reach for this very old tool.

GuestWe do it because we still have the same bodies and the same needs to feel part of something bigger. Even now, with all our gadgets, we still find that a simple empty stomach is the best way to clear the clutter out of our heads and remember what actually matters.

HostThe same empty stomach that makes us a bit short with our friends on a busy Tuesday turns out to be an ancient way of slowing down to see the world a bit more clearly.

GuestPeople still find that the most powerful thing they can do to change their mind is to simply change what they put on their plate.

HostThat old ache in the belly might just be the most common ground we have left.