• It is a well-known experience that the only truly enjoyable and profitable way of studying mathematics is the method of "filling in details" by one's own efforts.

    Cornelius Lanczos: It is a well-known experience that the only truly enjoyable and profitable way of studying mathematics is the method of "filling in details" by one's own efforts.
    "Applied Analysis" by Cornelius Lanczos, Prentice-Hall, 1956.