Be Like the Sun
The sun is selfish. It's a self perpetuating ball of energy. It is fuelled by its own energy in a never ending mass of explosive fire.
Be like the sun.
Find what energizes you, and use it to fuel your own fire. The brighter you burn, the hotter you will glow; the more warmth you will radiate. The more you radiate, the more those around you will feel your energy and benefit from your warmth.
Be like the sun. Be selfish. Burn bright. Don't stop.