I have occasionally started thinking of some food as having at its base something that is like sand (flour, sugar, baking soda) and some foods have as their base tiny cells filled with water (like the tiny parts of a grapefruit). Think of the image of a person’s body filled with sand. Then think of another’s filled with cells full of water. It is an interesting image. Have you ever held a bag or toy animal stuffed with sand, it hardly moves kind of how you feel after you ate too much, or when you are stiff with arthritis.
Imagery can be inspirational. I think it was conjured up by the idea behind the ancient Indian netti pot of washing your insides with water. Think of the image of washing your insides with water and eating water filled cells, the two make sense together. I once read a similar metaphor: you wouldn’t try to clean the side of your car with a slice of pizza.