They say that to live human needs three kind of substance. First our body needs solid and liquid food, from which our body can generate energy. Secondly our lungs need air to keep the body running and ensure circulation and flow of the oxygen inside the blood vessels.
Additionally the one part in our body that needs equally as much of constant feeding and taking care of is our mind.
As our body stays strong with the energy we get from food, awake and alive with the air we recycle in our lungs, so do our mind stay healthy with the influences that it receives all around.
With each sense we collect experiences into our minds, like how leaves collect the moisture from the air into their veins. We enjoy tastes and colours, music and pictures, and even whole scenarios. They come to our mind and create a whole new meaning.
Every memory created from an experience, every idea created from an inspiration, is a fragment in the identity of every individual. Our mind, and how we nourish it, defines who we are. The strength of our psyche depends on how we nurse it. And everyone has their own needs. Like some people can't eat seafood, or drink milk, they have to know about it and live and nourish themselves accordingly to it. Then our body and mind can live in peace.