Good day to you Aryobarzan.
You just posted some of my favorite subject that dominate our life: BRAIN and HEART.
This two Gland, yes they are glands, even if some medical scientist don`t agree.
Just about for everything, we use our brain, and dipend how we use that makes the difference of living.
Heart, is one gland that try to controll and over power the brain. Wel, lots time the heart wins ove the brain for: love, passion, and impulse, and hate.
If we use the brain properly, we have good morality, decision making and understanding the world around us.
On the other hand: when we have to use our heart, we have very little control over it.
The Heart works by emotion, and not reason.
So, we follow this emotion that, on the end we end up be very happy, or unhappy.
Now, here comes the answer of your question.
If the heart wins our emotion over brain, we feel lots of joy wich is happiness.. Doing so, the Heart overpower the brain, by pomping to much blod and offuscate our brain.
When this happen, most of the time, morality, is lost. Bondary is lost. Attidude is lost.
What we got left is: instints of emotional feelings.
Unfortuanate, for us, there is not midle road between brain and heart.
There is never a midle road in life.
Peace and Joy, be with you all.
Cathy