The experimenter dealing with nature faces an outside and often hard world. Natures' curriculum cannot be changed.
in his Nobel Autobiography, edited by Gösta Ekspong (1997). Nobel Lectures in Physics 1991-1995. World Scientific. p. 161. ISBN 9810226780.
Experimental science is a craft and an art, and part of the art is knowing when to end a fruitless experiment. There is a danger of becoming obsessed with a fruitless experiment even if it goes nowhere. It is always a good plan for a speculative experimenter to have two experiments going, or at least one going and one being built.Martin Lewis Perl