Challenging the Gravity through Necessity

We all need food. We rely on food. Living on food. Some animals fight for foods. Some die for foods. Some are killed for food. Some starve for foods. But as humans we get our foods with minimum conflict because we don't repay to the environment. We consume surplus of foods than our necessity. Therefore we cannot overcome the gravitational force of earth. We are downward, lethargic, sedentary and sluggish. Hence we are not able to challenge the gravity. Even through meditation we cannot promote levity. We need machineries for expanding such capacity. Can you understand a mind of a humming bird? They will tell you how much they feel lightness f the life. Because they consume only up to the necessity. They don't have food-stores or food-banks. They are not craving for foods. That is the secret of happiness.