Example:
lyrics:

Everyone's life is bittersweet
It's a door that opens wide
And no man can call himself complete
Till he's seen it from both sides

This door swings both ways
It's marked 'In' and 'Out'
Some days you'll want to cry
And some days you will shout

This door swings both ways
It goes back and forth
In comes a southern breeze
Or a cold wind from the north

This door swings both ways
Lets in joy and pain
In comes the morning sun
And then the evening rain

This door swings both ways
Lets in dark and light
Every day you make the choice
To let in wrong or right

When shadows fall
You must prepare yourself for sunshine
For everything there is an end
And so my friend you must be brave

This door swings both ways
Which one will it be
Will we live in happiness
Or dwell in misery

This door swings both ways
Lets in earth and sky
Make the most of livin'
If you're not prepared to die
Make the most of livin'
If you're not prepared to die

Example:
Woah, I just found out Eddie's door swings both ways! This is great dirt! This explains all the time he spends over at Oscar's apartment!