Great Krashen published in 1985 about the learner’s affective filters when acquiring and learning a second or a foreign language – they are paramount:
Foreign and second languages are only acquired if there’s an understandable input and if the affective filters are so low as allowing input to enter. When the filter is low and input is exposed and understood, acquisition is accomplished. As a matter of fact you cannot avoid mind organism to function; it is as automatic as any other organism.
The words are not exactly the same: I have translated from Spanish. / Photo from: www callcentrehelper com