I have been asked to say something about the practical position of the Vedanta philosophy. As I have told you, theory is very good indeed, but how are we to carry it into practice? If it be absolutely impracticable, no theory is of any value whatever, except as intellectual gymnastics. The Vedanta, therefore, as a religion must be intensely practical. We must be able to carry it out in every part of our lives. And not only this, the fictitious differentiation between religion and the life of the world must vanish, for the Vedanta teaches oneness — one life throughout. The ideals of religion must cover the whole field of life, they must enter into all our thoughts, and more and more into practice. I will enter gradually on the practical side as we proceed. But this series of lectures is intended to be a basis, and so we must first apply ourselves to theories and understand how they are worked out, proceeding from forest caves to busy streets and cities; and one peculiar feature we find is that many of these thoughts have been the outcome, not of retirement into forests, but have emanated from persons whom we expect to lead the busiest lives — from ruling monarchs.
- Swami Vivekananda
The Complete Works of Swami Vivekananda/Volume 2/Practical Vedanta and other lectures/Practical Vedanta: Part I