Both imagination and reason have great role in such fields as physics and history taken for an analysis. In fact, imagination is believed to be central for history and not so important for physics. Further studying and researching has shown that this is not completely correct to think so. Moreover, one of the greatest conflicts of the Western civilizations was the problem of reason and imagination. I presume that the role of certain reasonable factors in most of areas depends on the essence of the investigated field of knowledge.