Answer:
This question requires a personal story. I will write one which you can take as an example and modify as you like.
Explanation:
When I was little I was full of energy, almost like a star being born, full of light.
Then I grew, and as I did that energy was wasted. Still, I have energy left to imagine what it will be like to have children in the future.
When I have them and they grow up, they will also form their own life and they will detach from me. That part of me will be detaching from my body, as happens with the <em>"planetary nebula"</em>.
But at least when I'm no longer here, I know that I will have enlightened everyone around me with the love and shine that always characterized me.