Samarin found that the resemblance to human language was just on the surface. He concluded that glossolalia is "only a facade of language". The syllable string did not form words, the stream of speech was not internally organized, and – most importantly of all – there was no systematic relationship between units of speech and concepts. Humans use language to communicate but glossolalia does not. Therefore, he concluded that glossolalia is not "a specimen of human language because it is neither internally organized nor systematically related to the world man perceives". On the basis of his linguistic analysis, Samarin defined Pentecostal glossolalia as "meaningless but phonologically structured human utterance, believed by the speaker to be a real language but bearing no systematic resemblance to any natural language, living or dead".