It is self-evident that the food you eat is manufacturing the mind all the time. It is matter. The Self is above any connection with food. Whether you eat or not does not matter. Whether you think or not ... does not matter. It is infinite light. Its light is the same always. If you put a blue or a green glass [before a light], what has that to do with the light? Its colour is unchangeable. It is the mind which changes and gives the different colours. The moment the spirit leaves the body, the whole thing goes to pieces.
- Swami Vivekananda
(Delivered in San Francisco, on May 29, 1900)The Complete Works of Swami Vivekananda/Volume 1/Lectures And Discourses/The Gita III