Though the world has changed considerably in its outward material aspect, means of communication, scientific inventions, etc., there has not been any great change in its inner spiritual side. The old faces of hunger and love, and the simple joys and fears of the heart, belong to the permanent stuff of human nature. The true interests of humanity, the deep passions of religion, and the great problems of philosophy have not been superseded as material things have been.
Indian thought is a chapter of the history of the human mind, full of vital meaning for us. The ideas of the great thinkers are never obsolete. They animate the progress that seems to kill them. The most ancient fancies sometimes startle us by their strikingly modern character, for insight does not depend on modernity.
(Source: Preface to Indian Philosophy)