Enemies.

Mind and heart sometimes ask questions. They can drive you crazy. They can make you angry.
Then you realised what are you able to do and what you shouldn't do.
Those moments are created to make you think about everything.
What are you thinking about?
Past? Present? Future? It's time to grow up, are you agree?
It's time to be strong. You must stay strong. What did you expect?
As I said, I don't know if you know it but, heart and mind are enemies.