I reached a conclusion the other day
when I was contemplating
the regret phenomenon :

You don't feel regret for the things you've done,
you feel regret for the things you haven't;
You don't feel regret for the words you've said,
you feel regret for the ones you haven't;
You don't feel regret for the love you've expressed,
you feel regret for the love you haven't;
You don't feel regret for the lips you've kissed,  
you feel regret for the ones you haven't;
You don't feel regret for the hands you've held,  
you feel regret for the hands you haven't;
You don't feel regret for the smiles you've thrown,  
you feel regret for the ones you haven't;
You don't feel regret for the things you've done,  
you feel regret for the things you haven't;

Your life, you leave behind.
Your belongings, you leave behind.
Your memories, you leave behind.
Your heart, your love, your sorrow,
your happiness, you leave behind.
the law of nature it is, if you want
to have something
that your heart desires,
you must lose something -instead.-

- Wishing the reverse law was also true.-
You leave yours behind.
You leave - you - behind.
at last, you are one alone soulless person
who has nothing to gain
'cause he has nothing to lose
- except your heart. -
The hidden law of nature it is,
the first law of thermodynamics.