For a better understanding, the mind analyzes or breaks things down into separate parts. This break-down is mentally artificial because the universe is one.
Our total makeup as individuals is physical (the whole body), mental (the brain's productivity), and emotional (the effects of the nervous system--which includes the brain, the spinal cord, and the many nerve cells that conduct information throughout the body).
An individual is not an isolated being; a person is an intricate part of the universe. As human beings, we have to deal with a physical environment, a mental environment, an emotional environment, and a social environment.
Since all is connected, and since we have to adapt or adjust to these ever-changing environments. We must continually balance ourselves in regards to each one in order to be happy or content.
To have and maintain a PHYSICAL BALANCE, we need air, water, food, sunlight, exercise, sleep, and sex.
The MENTAL balancing includes having adequate wisdom, knowledge, and a current flow of information necessary for sufficient awareness.
For an EMOTIONAL balance, it helps to have love and affection as well as to exercise rational and optimistic thinking.
And, the SOCIAL balancing includes getting along with others in one's environment, cooperating with some people for benevolent purposes, and harmonizing oneself in a oneness with all people in a humane way for the good of humanity.