Be kind when no one's watching.
Anyone can play a role when the lights are on. They smile as they shake the hand of the CEO, only to ignore the janitor on the way out the door.
You are not anyone.
You are a person who treats the waiter with sincere, genuine respect. You are a person who puts their shopping cart back. You are a person who shows up for a friend in their darkest moment. You are a person who buys a hot coffee for the person standing in the cold.
Be kind and generous to everyone around you. Not because you want credit for it. Not because someone might take notice.
But because your character is defined by who you are when no one's watching. That is who you are. That is your destiny.
Nicely written. The world is a small village, you don't know who you will meet tomorrow, hence being nice to everyone you meet is not an advice but a necessity. Even if you don't meet them again your children might meet them tomorrow.