Your body is not separate from you. It is you — or at least the part of you that the world can see and that does your work. Your body carries you through every day. It is the instrument through which you learn, play, help, create, and love. Take care of it.

This is not about looking a certain way. It is not about being thin or muscular or tall or anything that magazines and screens tell you to be. It is about keeping your instrument in good working order so you can do what you were born to do.

The First Instrument of Duty

The ancient thinkers called the body “the first instrument of duty.” Before you can do anything good in the world — help someone, build something, learn something, create something — you need a body that works. Not a perfect body. Not a beautiful body. A functioning body. One that has been rested, fed, moved, and cared for.

Think about it this way: if someone handed you the most important assignment of your life and then asked, “Do you have everything you need to complete it?” — your body is the first answer. It is the vehicle that carries your mind to the classroom, your hands to the work, your voice to the conversation. When you skip sleep, skip meals, or sit motionless for days on end, you are not just being lazy about health — you are disabling the very thing that lets you show up and do your part.

So sleep enough. At your age, nine to eleven hours a night — and that is not a suggestion, it is what your growing body needs. Eat food that gives you energy, not just food that tastes good. Drink water throughout the day. Move your body — walk, run, swim, climb, play, ride a bike. It does not matter what you choose, so long as you do something that makes your heart beat faster and your muscles work harder. Your body was built to move. When you move, your body gets stronger, your mood improves, your brain works better, and you sleep more soundly. When you stop moving, everything slowly goes wrong.

Cleanliness Is Respect for Your Instrument

Keeping your body clean is not vanity. It is respect — for yourself and for the people around you. When you wake up in the morning and brush your teeth, wash your face, comb your hair, and put on clean clothes, you are not doing it for the world. You are doing it because you are worth the effort. Every small act of self-care is a quiet statement: I matter. My day matters. The people I will meet today matter enough for me to show up properly.

A musician who never tunes their instrument cannot play well. A person who neglects their body cannot do their best work. Stand up straight — not because someone is watching, but because your posture tells your own mind whether you are ready for the day or shrinking from it. Take care of your teeth, your hands, your hair — the small details that seem tiny but add up to a whole impression. These habits are not about what other people think of you. They are about what you think of yourself. When you stop caring for yourself, you start caring less for everything else too — your work, your relationships, your goals.

But here is the key: take care of yourself not for vanity but for purpose. You are not grooming for a mirror. You are maintaining the instrument that lets you do your work in the world. That is a different thing, and it makes all the difference in how you carry yourself.

The Hero Who Never Showed Off

There is an ancient story about a hero named Hanumān who had the most extraordinary body anyone had ever seen. He could grow as large as a mountain — so tall that clouds wrapped around His shoulders. He could shrink to the size of a cat and slip through any crack. He once crossed an entire ocean in a single leap, flying through the sky like a comet.

But here is what made Hanumān remarkable: He never used His body for showing off. Not once. Every incredible physical act He performed was in service of someone else.

He leaped across the ocean to find a kidnapped woman named Sītā and bring Her hope. He burned down a city to send a message to the demon who held Her captive. When a warrior was dying on the battlefield and needed a rare healing herb, Hanumān flew to a distant mountain to find it. He could not tell which herb was the right one, so He uprooted the entire mountain and carried it back on His palm, because there was no time to waste.

A mountain. On His palm. Across the sky.

And when the warrior was healed and the battle was won, Hanumān did not stand around waiting for applause. He simply went back to where He was needed next.

The Point of It All

Your body is not a trophy to display. It is a tool — the most powerful tool you will ever own — for doing good work in the world. Every glass of water you drink, every hour of sleep, every walk around the block, every meal of real food is not boring maintenance. It is you keeping your instrument ready for the moment when someone needs what only you can give.

You do not need to be the strongest or the fastest. You do not need a perfect body — no such thing exists, despite what you may see on screens. You need a body that is healthy enough to carry you through a full, active, meaningful life. That body is built by the choices you make every day — small, steady, unglamorous choices that add up to something extraordinary over time.

Take care of your body. It is the only one you will ever get, and it has a lot of work to do.