At the beginning of the Gospel according to St. John, there is the following sentence. ‘In the beginning was the Word, and the Word was with God, and the Word was God.’ What is this ‘God’? What is this ‘Word’? All species on earth form societies of their own species, ‘specia’ in which the members are individuals of that species (1). Specia is maintained by reproductive behavior and other ones performed between individuals. For that purpose it is necessary to communicate between individuals. Communication is performed using physical and chemical signals such as odors, sounds, contacts and gestures. We can understand that every species has a ‘language’ if ‘language’ is defined as those physical and chemical means used to communicate between individuals of same species. Behavioral patterns exchanged between individuals are various such as biofilm formation of bacteria, the tail-wagging dance of honey bee to inform honey source and primates’ behavior released by gestures or voices. However, in every case ‘language’ is used to communicate between individuals. What is the reason that enables to communicate between individuals of same species by ‘language’? Why can we Homo sapiens communicate each other by language? It is because the way to abstract environments and the external world is the same in the species Homo sapiens. For example, let us think about the word ‘tree’. Though there are no two identical trees at all in the world, we say ‘tree’ abstracting all trees. With other words such as ‘rain’, ‘river’ and ‘sea’, the situation is the same. We abstract to discard individuality of things and events. The way to abstract is innate, so even a one-year-old infant can say ‘rain’ by watching rain on a television screen. We can only say that our way of abstracting is determined previously by the way we interact with the external world. Thus, we cannot explain the origin of our ability to abstract rain as rain, river as river and sky as sky, for example. As different species have different ways of interacting with the external world, the way to abstract the external world will also change. As ‘language’ can be considered to change if the way of abstracting changes, a different species has a different ‘language’. A paramecium has its own ‘language’ corresponding to the way it abstracts the external world. In the same manner, a bird has its own ‘language’ and so on. Though the natural world is infinite, living things cannot be and need not be compatible with the infinite. ‘Language’ is an internal and indispensable means to abstract and distinguish the external world for living things to exist in the natural world. Now, if ‘language’ is a phenomenon so widely found in nature, what is the voice of God urging decision-making described in the Bible that ancient people had heard it actually? If the voice of God had been heard actually by the ears of ancient people in the form of human language, it is quite natural to think that also in every species other than Homo sapiens the voice of God is heard in the form of an inherent ‘language’ of each species. At present, Homo sapiens are known to be nothing but one of the eukaryote species, so it is incredible that special event had happened only to Homo sapiens. When we think what the factor is which urges decision- making, an instinct occurs to us. The instinct is obligatory and gives species’ individuals no choice in their behavior. Its characteristics coincide with that of the voice of God. The voice of God heard once by ancient people, was an instinct. If this is true, we think that God can be said in a different word, Nature’s real nature or the true nature of Nature. Long ago, Plotinus had already said that (God=to hen=) the One=Nature’s real nature. Then, why could not the voice of God become heard by us Homo sapiens?