I hope you learn from this story, for the point of it is this:

You do not know your best friend – a presence you will miss –

You do not know your older brother, nor do you know your aunt,

You do not know your younger sister, for the things you say, you can't.

The next time you utter hateful words, notice how your best friend will flinch,

And notice how your brother and your sister draw back another inch.