What is the difference between men and animals? ... "Food and [sleep],
procreation of the species, and fear exist in common with the animals. There is one difference: Man can control all these and become God, the master." Animals cannot do it. Animals can do charitable work. Ants do it. Dogs do it. What is the difference then? Men can be masters of themselves. They can resist the reaction to anything.... The animal cannot resist anything. He is held ... by the string of nature everywhere. That is all the distinction. One is the master of nature, the other the slave of nature. What is nature? The five senses....
- Swami Vivekananda
(Delivered in San Francisco, April 5, 1900) The Complete Works of Swami Vivekananda/Volume 1/Lectures And Discourses/Practical Religion: Breathing And