Our energy system may not be visible but it is just as important as the physical body to which it is of course closely related. Apart from that it is related to our emotions and thoughts, too,
Swami Ji writes in his blog about the energy that surrounds us everywhere, how it influences our actions and reactions and how we can bring the energy back in the flow, for example with exercises or spiritual healing.
He writes about people who are surrounded by positive energy and people who like to spread negative energy. Just keep your own energy level up!