In 1876, a professor asked his students, "Has God created everything that exists in the universe?" One of the students replied a prompt 'Yes.'
The professor again asked, "What about evil? Has God created evil too? The student stood silently. After a minute passed he raised his hands to ask a question. Professor allowed him to do so.
He asked, "Does cold exist?" Professor said, "Yes! Don't you feel the cold dear?"
Student said, "I'm sorry but you are wrong Sir. Cold is a complete absence of heat...There is no cold, it is only an absence of heat." Student asked again, "Does darkness exist?"
Professor said, "Yes, It's dark at night!"
Student said, "You are again wrong Sir! There is no such thing like darkness. Its actually the absence of light. Sir! We always study light & heat, but not cold & darkness. Similarly, the evil does not exist. Actually it is the absence of love, faith & true belief in God."
In 1893 he shot to world fame after his lecture at Parliament of the world, convened at Chicago. Vivekananda addressed the audience on the greatness of Hindu religion. His address began with the words “My dear Sisters and Brothers of America”. This thrilled the audience, as this greeting contained the spirit of universal brotherhood. Teachings and philosophy of Swami Vivekananda stressed on different aspects of religion, youth, education, faith, character building as well as social issues pertaining to India.
Vivekananda was a Hindu monk from India who played significant role in introducing Vedanta to the Western world and also reviving and redefining certain aspect of the religion within India. Rabindranath Tagore commented about Swami Vivekananda and his teachings, "If you want to know India, study Vivekananda. In him everything is positive and nothing negative."
Vivekananda realized a country's future depends on its people, so he mainly stressed on man, "man-making is my mission", that's how he described his teaching. Vivekananda put his real ideals in few words and that was: "to preach unto mankind their divinity, and how to make it manifest in every movement of life." Read more at - wikipedia.org