Swami Vivekananda's illuminative ideas on religion are spread over nearly 4200 pages of his Complete Works. This book containing eight lectures is a compilation from the same and serves as a small introduction to his voluminous writings, talks, and lectures on the subject.
Whatever you believe, that you will be. If you believe yourselves to be sages, sages you will be tomorrow. There is nothing to obstruct you.
-Swami Vivekananda