Yoga Course 118. Jnana Yoga. Yoga of knowledge. This is a section of yoga in which no physical exercise is required. We have intelligence and our abilities to think, to ask questions, to answer. These abilities are inherent in our nature, because the principle on which the intellect (the principle of reason) is built was one of the first created during the creation of the universe, says yoga. Our mind is not an invention of something new, but just a way to use one of the fundamental principles on which the universe is built. The principle by which our mind works is present everywhere in the Universe. Our higher nervous activity is a way to use this principle.