Shiva’s trishul represents the three fundamental aspects of life. These are the three fundamental dimensions of life that are symbolized in many ways. They can also be called Ida, Pingala and Sushumna. These are the three basic nadis – the left, the right and the central – in the pranamaya kosha, or the energy body of the human system. Nadis are pathways or channels of prana in the system. There are 72,000 nadis that spring from the three fundamental ones.
The Pingala and Ida represent the basic duality in the existence. It is this duality which we traditionally personify as Shiva and Shakti. You can simply call it masculine and feminine. When I say masculine and feminine, I am not talking in terms of sex – about being male or female – but in terms of certain qualities in nature. You could say the logical and the intuitive aspect of you.
Bringing a balance between the Ida and Pingala will make you effective in the world; this will allow you to handle life aspects well. Most people live and die in Ida and Pingala. Sushumna, the central space, remains dormant. But Sushumna is the most significant aspect of human physiology. Life really begins only when energies enter into Sushumna. You attain to a new kind of balance, an inner balance where whatever happens outside, there is a certain space within you that never gets disturbed and cannot be touched by outside situations.