Our heart is our sensor out into the world and corresponds with that around us.
If we are hurt, sad, angry or bitter, this will be felt in our surroundings as the heart sends out enormous frequencies about the biggest muscle we have. The heart is the center of our body, as well as the middle of our seven energy senates (shakra). That is how many good and high-frequency emotions such as joy, love, harmony, empathy etc. which determines the strength of what we send out from the heart and again want to receive back.