Energy is all pervasive in the universe. It connects all of us to each other and to things. Even though we remain oblivious to the fact, energy is constantly entering and leaving our beings.
As energy becomes more subtle it becomes more pervasive. The energy of the body is not as fine as the energy of the breath.
The energy of thought is even subtler and emanates from pure consciousness which makes it the most pervasive. Energy always carries a charge.
Similar charges attract each other which is why anger incites anger and trust begets trust.
Energy is communicative. The energy surrounding us whether from our house or from the people enters our energy fields and auras. This can influence our responses and physical health.
A low energy system can drain a person with a high level of energy. An optimistic person, if unaware of how to protect himself can be drained by a person with a depressed outlook.