The Vedas are the most sacred scriptures of Hinduism. According to tradition, when God creates the worlds, He reveals the Vedas for the welfare of the worlds and when He ends the creation, He takes them back again. Some people say that all human knowledge is available in the Vedas in symbolic form and that the knowledge of all our discoveries and inventions is already contained in the Vedas. It is true that the Vedas are not mere books of some magical chants. They are loaded with spiritual knowledge, which reveals itself to the degree we are spiritually advanced.