We can build

A special mirror

Around us

From the outside

It reflects

Negative input

While letting

Positive input in

(See Reflection)

From the inside

It reflects

Negative output

Back in

While letting

Positive output

Pass through

To the outside

To illustrate,

When someone

Says or does

Something that

Would hurt us

If we let it in,

We can choose

To not let it in,

Realizing that

It will only hurt us

If we take it to heart

Similarly,

When something nice

Comes our way

We can let it in

As far as

The other side

Of the mirror,

When we're about to

Say or do something

We can ask ourselves

If we'd like

That thing done to us,

A la the golden rule

Further, ironically,

What we do may

Automatically

Apply to ourselves

For example,

Suppose that it's late

And our neighbors

Are making noise

Keeping us awake

We might think about

Yelling out the window

"Shut up, you bleep!"

If we do yell that,

It applies to us, too,

For being loudly rude

In yelling it

A concise way

To sum this all up is:

Bounce back the bad

From without,

Letting in the good

Bounce back the bad

From within,

Letting out the good