The book one must read to learn natural sciences is the book of nature. The book from which to learn religion is your own mind and heart.
Swami VivekanandaEach man must begin where he stands, must learn how to control the things that are nearest to him.
Swami VivekanandaEven if our every attempt is a failure, and we bleed and are torn asunder, yet, through all this, we have to preserve our heart - we must assert our Godhead in the midst of all these difficulties.
Swami Vivekananda