To understand the mechanisms of the Ego, we use the analogy of the tree. A tree develops itself through the nutrients it can gather from the soil, depending exclusively on its roots. Its main concern is to grow and expand but only in one direction, upwards. Its growth is eminently vertical and one-dimensional.
The same analogy can be used to define the Ego and how it depends totally on little details, and such as a the roots of the tree, the details are the elements that channel sufficient energy to the centers of our body, the physical human “machine”, to keep the Ego alive. These details are our psychological defects, our weakness and our imperfections.