It is meaningless to compare the knowledge of the ancient sages with that of modern scientists. How many sages performed arduous penances to acquire divine potencies. Today’s doctors perform surgical operations. They acquire this skill after long training here and abroad and after many successes and failures. They use sophisticated instruments. But in ancient times, there was a highly skilled master of medicine and surgery, the sage Bharadwaja. He taught surgery to the world. He was the author of the science of Ayurveda -the Science of Life. People consider that Ayurvedic medicines do not yield quick results. People today have a craze for quick results. Quickness may operate both ways. Today antibiotics are used. A few drops of the medicine bring down the fever, but later fever goes up, there are also adverse reactions. In the treatment employed by the ancient sages as a result of their penances, there were no such reactions. Because of their penance, their vision transcended the barriers of distance. They could directly converse with the power of Nature. Today crores are spent on telecommunications, radio and television. In those days there was no expense at all of this kind. When the mind was purified and divinised, they could acquire super human powers. (SSS Vol.24, pp. 83-84)