The indispensableness to religion of the imagination is due to that faculty's power of realizing what is not perceptually present.
"The Approach to Philosophy"
Ralph Barton Perry
"I see now," said Miss Youmans to me, "the indispensableness of kindergartens to develop the faculties; more than half the children are intellectually demoralized by neglect or injudicious teaching before they are seven years old."
"Education in The Home, The Kindergarten, and The Primary School"
Elizabeth P. Peabody
But the idea of accurate method had to be made very familiar to men by the successes of physical science in the search after truths of one kind, before the indispensableness of applying it in the search after truths of all kinds had extended to the science of the constitution and succession of social states.
"Rousseau Volumes I. and II."
John Morley