All human victories, all human progress, stand upon the inner force.
A great deal of time and intellectual force are lost in the world, because the false seems great and the truth so small and insignificant.
He who experiments must, while doing so, divest himself of every preconception. It is clear then that if we wish to make use of a method of experimental psychology, the first thing necessary is to renounce all former creeds and to proceed by means of the method in the search for truth.
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