The paper contains the abridged lecture delivered by the invitation of the Hungarian Psychological Association in honour of the bicentennial birthday of Charles Darwin (1809). The results obtained following the examination of the sensations starting from the human small and large intestines have guided the author to the realization of the possibility of rendering conscious the unconscious, through electrophysiologically detectable impulses originating from the gut, by the help of learning. The article is a short summary of the author's theory according to which personal awareness and the non-conscious domain are complementary psychic phenomena steadily in transition from each-other. The twin conscious- unconscious signals can be regarded as important steps in the process of Darwinian selection. They indicate the priority of the human race in evolution and at the same time they represent a stable relief from the burden of adaptation to the natural and social environment. Some of the ideas of the present study have been outlined earlier in this Journal (58 (2003) No.2), as well as in the Hungarian book 'A rejtozködo elme' (The hiding mind', Vince Kiadó, 2004).
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