The greatest difficulty is what? We talk and theorise. The vast majority of mankind must deal with things that are concrete. For the dull people cannot see all the highest philosophy. Thus it ends. You may be graduates [in] all sciences in the world, ... but if you have not realised, you must become a baby and learn.
- Swami Vivekananda
(Delivered in San Francisco, March 28, 1900) (Delivered in San Francisco, March 28, 1900)