Swami Vivekananda - Science and Religion

 Experience is the only source of knowledge. In the world, religion is the only science where there is no surety, because it is not taught as a science of experience. This should not be. There is always, however, a small group of men who teach religion from experience. They are called mystics, and these mystics in every religion speak the same tongue and teach the same truth. This is the real science of religion. As mathematics in every part of the world does not differ, so the mystics do not differ. They are all similarly constituted and similarly situated. Their experience is the same; and this becomes law.

In the church, religionists first learn a religion, then begin to practice it; they do not take experience as the basis of their belief. But the mystic starts out in search of truth, experiences it first, and then formulates his creed. The church takes the experience of others; the mystic has his own experience. The church goes from the outside in; the mystic goes from the inside out.

Religion deals with the truths of the metaphysical world just as chemistry and the other natural sciences deal with the truths of the physical world. The book one must read to learn chemistry is the book of nature. The book from which to learn religion is your own mind and heart. The sage is often ignorant of physical science, because he reads the wrong book - the book within; and the scientist is too often ignorant of religion, because he too reads the wrong book - the book without.