To understand a name you must be acquainted with the particular of which it is a name. - Bertrand Russell

Mathematics, rightly viewed, possesses not only truth, but supreme beauty – a beauty cold and austere, like that of sculpture, without appeal to any part of our weaker nature, without the gorgeous trappings of painting or music, yet sublimely pure, and capable of a stern perfection such as only the greatest art can show. The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of highest excellence, is to be found in mathematics as surely as in poetry. What is best in mathematics deserves not merely to be learnt as a task, but to be assimilated as a part of daily thought, and brought again and again before the mind with ever-renewed encouragement.

Three passions, simple but overwhelmingly strong have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind.

Everything is vague to a degree you do not realize till you have tried to make it precise.