I first encountered this wonderful quote in the foreword to one of the editions of the Feynman Lectures, the foreword in this case being written by an awesome physics professor in my college (V.Balakrishnan a.k.a Balki): "... the combination of physics and mathematics in the Feynman Lectures surely embodies in an exemplary manner what has been called 'the unreasonable effectiveness of mathematics in the physical sciences' (Wigner)"

Balki also introduced us to the mythical student HAROLD - Hypothetical Alert Reader Of Limitless Dedication, whom he had encountered in Schwinger's lectures.