Equivalent exchange

What does it mean an equivalent exchange?  It might be love but It may another thing as well.
When you believe in something It seems real, when you believe you are controlling everything, you could be wrong.

Equivalent exchange is where you can gain something if you are ready to lose something  in exchange. Where can we put this theory?. You can put it in everything of your life. Everything relies on losing and replacing until you are full. If you have lost everything in your life and you want to start again, just replace with the smallest happy things until filling your hole, Therefore, if you hate your past, if you want to change, if you are tired of living in the past, Just change yourself. Whereas we can know about life and we can stand up, It is enough.

To sum up, if you want a change in your life, you have to do things that you have never done before.