From Volume 9 of the Complete Works of Swami Vivekananda – Notes of Lectures and Classes

Swami Vivekananda delivered scores of lectures and classes during his relatively short ministry. Unfortunately the Swami was not always accompanied by a professional stenographer who could keep pace with the exceptional speed of his extempore deliveries. However, a few students managed to take notes of some lectures and classes, which are today the only available records of works that would otherwise have been lost to the world.
The original quotation marks of the note-takers have been reproduced.
— Publisher