The subject is very large and the time is short; a full analysis of the religion of the Hindus is impossible in one lecture. I will, therefore, present before you the salient points of o...ur religion in as simple language as I can. The word Hindu, by which it is the fashion nowadays to style ourselves, has lost all its meaning, for this word merely meant those who lived on the other side of the river Indus (in Sanskrit, Sindhu). This name was murdered into Hindu by the ancient Persians, and all people living on the other side of the river Sindhu were called by them Hindus. Thus this word has come down to us; and during the Mohammedan rule we took up the word ourselves. There may not be any harm in using the word of course; but, as I have said, it has lost its significance, for you may mark that all the people who live on this side of the Indus in modern times do not follow the same religion as they did in ancient times. The word, therefore, covers not only Hindus proper, but Mohammedans, Christians, Jains, and other people who live in India. I therefore, would not use the word Hindu. What word should we use then? The other words which alone we can use are either the Vaidikas, followers of the Vedas, or better still, the Vedantists, followers of the Vedanta. Most of the great religions of the world owe allegiance to certain books which they believe are the words of God or some other supernatural beings, and which are the basis of their religion. Now of all these books, according to the modern savants of the West, the oldest are the Vedas of the Hindus. A little understanding, therefore, is necessary about the Vedas.
- Swami Vivekananda
The Complete Works of Swami Vivekananda/Volume 3/Lectures from Colombo to Almora/Vedantism(1)