“YOGA-SIDDHI, the perfection that comesfrom the practice of Yoga, can be best attained by the combined working of four great instruments. There is, first, the knowledge of the truths, principles, powers and processes that govern therealisation — sastra. Next comes a patient and persistent action on the lines laid down by this knowledge, the force of our personal effort — utsaha.There intervenes, third, uplifting our knowledge and effort into the domain of spiritual experience, the direct suggestion, example and influence of the Teacher — guru. Last comes the instrumentality of Time — kala; for in all things there is a cycle of their action and a period of the divine movement.
The supreme Shastra of the integral Yogais the eternal Veda secret in the heart of every thinking and living being. The lotus of the eternal knowledge and the eternal perfection is a bud closed and folded up within us. It opens swiftly or gradually, petal by petal, through successive realisations, once the mind of man begins to turn towards the Eternal, once his heart, no longer compressed and confined by attachment to finite appearances, becomes enamoured, in whatever degree, of the Infinite.”
The Synthesis of Yoga