Listen to the birds chirping. See them flying. In the day, they're out in the air and sunshine. At night, they perch on a limb. They gather food when they're hungry. They eat what they like; as much as feels right. They spend most of the day flying around. They find mates. They raise their young. They do their thing.
You don't see fat birds, do you? Birds don't eat too much. They use their bodies and move. They're not worried about themselves, or ill at ease and in need of comfort. They don't need to eat and eat and eat to feel good. They are totally themselves, and don't care one way or the other. They just are. And they are fine.