Swami Vivekananda was a renowned disciple of Sri Ramakrishna and a Vedanta revivalist. He was a great orator and writer, and his speeches and writings have inspired millions of people around the world. Here are some of his famous speeches and writings that have left a lasting impact on society.

1. "Sisters and Brothers of America" - This was Swami Vivekananda's opening address at the World Parliament of Religions in Chicago in 1893. In this speech, he introduced Hinduism to the Western world and emphasized the importance of unity and tolerance among different religions.

2. "The Real Nature of Man" - In this lecture, Swami Vivekananda spoke about the true nature of human beings and how they can realize their full potential through spiritual growth and self-realization.

3. "Karma Yoga" - This book by Swami Vivekananda teaches the principles of Karma Yoga, which is the path of selfless action and service. It emphasizes the importance of doing one's duty without expecting any reward.

4. "Raja Yoga" - In this book, Swami Vivekananda explains the principles and practices of Raja Yoga, which is the path of meditation and self-control. He also discusses the different stages of spiritual evolution and how one can attain enlightenment.

5. "Jnana Yoga" - This book by Swami Vivekananda delves into the philosophy of Jnana Yoga, which is the path of knowledge and wisdom. He explains the concept of Maya (illusion) and how one can overcome it to attain the ultimate truth.

6. "Bhakti Yoga" - In this book, Swami Vivekananda talks about Bhakti Yoga, which is the path of devotion and love towards God. He explains how one can cultivate devotion and reach the highest state of consciousness through love and surrender.

7. "Practical Vedanta" - In this lecture, Swami Vivekananda spoke about the practical application of Vedanta in daily life. He emphasized the importance of living a life of service and selflessness, and how it can lead to spiritual growth.

In addition to these, Swami Vivekananda also delivered many other powerful speeches and wrote numerous books and articles on various topics such as education, social reform, and spirituality. His teachings continue to inspire people to this day, and his message of universal love, unity, and service remains relevant and timeless.