In Karma-Yoga Chapter I of the book ‘The Complete Works of Swami Vivekananda’ (Vol.I), in which Swami Vivekananda`s lectures and writings have been incorporated, Swami Vivekananda has said, “All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in your mind. The external world is simply the suggestion, the occasion, which sets you to study your own mind, but the object of your study is always your own mind. The falling of an apple gave the suggestion to Newton, and he studied his own mind. He rearranged all the previous links of thought in his mind and discovered a new link among them, which we call the law of gravitation. It was not in the apple nor in anything in the centre of the earth.
All knowledge, therefore, secular or spiritual, is in the human mind. In many cases it is not discovered, but remains covered, and when the covering is being slowly taken off, we say, “We are learning,” and the advance of knowledge is made by the advance of this process of uncovering. The man from whom this veil is being lifted is the more knowing man, the man upon whom it lies thick is ignorant, and the man from whom it has entirely gone is all-knowing, omniscient”.
Dr.Mahesh Chandra Panda