Eating well and feeding the body so that it absorbs light is what the metaphysicists, Kabbalists, and alchemists would call paying attention to the Earth body.
Caring for our bodies involves, caring for the spiritual body which is the Aether or World of Aether or Spirituality.
Our Mental Body is the World of Air and how we think and keep our thoughts positive, attracts to us positive people and experiences. As the old truism goes, "like attracts like."
The Body of Creativity is our World of Fire, and we feed this by allowing ourselves the playtime and creativity of children. This can be fed with a little or a lot of talent it doesn't matter. What matters to developing our abilities as psychics is that we feed the right hemisphere of the brain by allowing ourselves creative time in our lives.
Water World is in the video herein under Light Institute about our water bodies. Althogh there is more space in the atoms than there is actual physical matter and so Air/Space makes up the largest part of our physical beings ... there is also more water than there is physical dense matter such as carbon atoms which are the basis of all organic and living chemistry.
Finally, we come to the World of Earth, the physical world which includes how we eat and what we eat. Remembering when we eat to eat with consciousness. Chew, think of the farmer who grew your food, the soil it was grown in ... was it healthy soil without chemicals? Nutritious soil with minerals? As you pick up the food and handle it, as you cook, feel the love you have for your family go into the preparation of the food. Cook with love, just as the water molecules are reshaped by our love, so is the food we eat and place in our bodies.
Finally, chew well, think and be grateful and give appreciation to Divine for the beautiful food we eat. And, remember to be generous to those who may not have food.
You too can do this. As Mother Teresa said, "we the unwilling, led by the unknowing, are doing the impossible for the ungrateful. We have done so much, with so little, we are now qualified to do anything with nothing."