Quote #The Discovery of the Child

There is only one basis for observation: the children must be able to express themselves and thus reveal those needs and attitudes which would otherwise remain hidden or repressed in an environment that did not permit them to act spontaneously. An observer obviously needs something to observe, and if he must be trained to be able to see and recognize objective truth, he must have at his disposal children placed in such an environment that they can manifest their natural traits.

~ The Discovery of the Child