Gabriel Fauré, repeating a thought he had often expressed to me, wrote in a letter on the 2nd August 1910: "In piano music one cannot use padding; one must pay in cash so that it is interesting all the time. It is perhaps the most difficult genre if you want to be as satisfying as possible," and he added modestly, "and I do my best." Then, as if in reply to some unjust reproach, "Only it cannot be done any faster."
As quoted in At the Piano with Gabriel Fauré (1963) by Marguerite Long, p. 75