But it is the bane of psychology to suppose that where results are similar, processes must be the same. Psychologists are too apt to reason as geometers would, if the latter were to say that the diameter of a circle is the same thing as its semi-circumference, because, forsooth, they terminate in the same two points.
Interpretation
Similar results do not necessarily mean similar processes in psychology.
William James highlights a critical error in psychology: assuming that similar outcomes equate to identical underlying processes. By comparing psychological reasoning to geometric reasoning, he underscores the complexity of human behavior and warns against oversimplification in the study of the mind.
In practice
This quote could be used in a psychology class to emphasize the importance of understanding different psychological processes.
Many persons nowadays seem to think that any conclusion must be very scientific if the arguments in favor of it are derived from twitching of frogs' legs (especially if the frogs are decapitated) and that, on the other hand, any doctrine chiefly vouched for by the feelings of human beings (with heads on their shoulders) must be benighted and superstitious.
The man who knows governments most completely is he who troubles himself least about a definition which shall give their essence. Enjoying an intimate acquaintance with all their particularities in turn, he would naturally regard an abstract conception in which these were unified as a thing more misleading than enlightening.
All the higher, more penetrating ideals are revolutionary. They present themselves far less in the guise of effects of past experience than in that of probable causes of future experience, factors to which the environment and the lessons it has so far taught us must learn to bend.
The lunatic's visions of horror are all drawn from the material of daily fact. Our civilization is founded on the shambles, and every individual existence goes out in a lonely spasm of helpless agony.
It is astonishing how many mental operations we can explain when we have once grasped the principles of association
As there is no worse lie than a truth misunderstood by those who hear it, so reasonable arguments, challenges to magnanimity, and appeals to sympathy or justice, are folly when we are dealing with human crocodiles and boa-constrictors.
Where there is power, there is resistance.
We all dream; we do not understand our dreams, yet we act as if nothing strange goes on in our sleep minds, strange at least by comparison with the logical, purposeful doings of our minds when we are awake.
Time has no divisions to mark its passage, there is never a thunder-storm or blare of trumpets to announce the beginning of a new month or year. Even when a new century begins it is only we mortals who ring bells and fire off pistols.
In those days, we imagined ourselves as being kept in some kind of holding pen, waiting to be released into our lives. And when the moment came, our lives -- and time itself -- would speed up. How were we to know that our lives had in any case begun, that some advantage had already been gained, some damage already inflicted? Also, that our release would only be into a larger holding pen, whose boundaries would be at first undiscernible.
It has been frequently remarked, that it seems to have been reserved to the people of this country to decide, by their conduct and example, the important question, whether societies of men are really capable or not, of establishing good government from reflection and choice, or whether they are forever destined to depend, for their political constitutions, on accident and force.
Ask yourself these two questions: Do I remember at every moment that I am dying, and that everyone and everything else is, and so treat all beings at all times with compassion? Has my understanding of death and impermanence become so keen and so urgent that I am devoting every second to the pursuit of enlightenment? If you can answer "yes" to both of these, then you really understand impermanence.
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