The word ‘soul’ has so many interpretations that the science of psychology does not like to use it. Instead, psychology chooses the examination of the mind or consciousness as its subject. Religions and philosophies usually interpret soul as the spirit, and they set the idea of body against the concept of spirit. I have a notion of what soul is which has been taken a more and more definite shape. I'm not averse to using the word ‘soul’, and I even think it is a good phrase. I distinguish with this term the qualitatively new manifestation of the human mind and consciousness from the embryonic intellect and consciousness which can be found in the animal kingdom. I think the importance of the emergence of the human soul can only be compared to the change that took place when life emerged from the inanimate world. Both changes are such huge leaps in terms of the organization and complexity of systems that they are not comparable to the intermediate qualitative changes.

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