This is simply saying that the human soul is of the same nature as all the rest of the world, or vice versa, that all natural things have the same nature as the human soul. Not only animals, but also stones and planets have something analogous to our human soul.
Fechner is not fantastic at bottom, and yet how fantastical it sounds to hear him say: "I went out walking on a spring morning. The fields were green, the birds were singing, the dew sparkled, the smoke rose toward the clouds. Here and there a human being stirred. A glory of light was diffused over it all. It was only a small piece of the Earth. It was only a short moment of its existence. And yet, as I took all this in with an ever-widening understanding, I felt not alone the beauty, but also the truth that it is an angel who is thus passing through the sky with his rich, fresh and blooming nature, his living face upturned to the heavens. And I asked myself how it is that man can ever become so stunted that he sees nothing but a dry clod in the Earth and looks for angels above and beyond it, never finding them anywhere. But people call this sentimental dreaming."
"The Earth is a globe, and what it is besides may be found in the museums of natural history." Thus writes Fechner.
Now there can be no objection to comparing the beautiful Earth and the stars around it with angels, any more than there can be to the lover calling his sweetheart an angel of God. The Earth, the Moon, and the stars are according to Fechner's terminology angelic beings with souls; mediators between man and God. He knows very well that this is nothing but a matter of analogy and terminology, he is as atheistic as the most atheistic, but his fondness and reverence for the traditional terms lead him to attribute a soul to the material world and to give to this great and infinite soul a divine name.
If we waive this religious hobby of Fechner's, there still remains his peculiarity of using words and names in a symbolical sense. It is nothing but the old poetic way of calling a sweetheart's eyes heavenly stars and the stars of the blue heavens lovely eyes, which makes a snowy hill of a woman's breast, a zephyr of the wind, a nymph of a spring of water, and an erlking of an old willow tree. This poetic license has filled the whole world with good and evil spirits, mermaids, fairies, elfs, and goblins.
This is not a bad way of speaking, so long as we keep in mind, like a poet, what we are doing and that we are consciously using symbolical terms. Fechner does this only to a certain extent. A little spleen remains in his brain. It is this spleen which I intend to deal with in the proper light, in order to thus demonstrate the outcome of philosophy.
Fechner is not aware that his universal soul reflects only one half of our present outcome of philosophical study. The other half, which renders an understanding of the whole possible, consists in the perception that not only are all material things endowed with a soul, but that all souls, including the human ones, are ordinary things.
Philosophy has not only deified the world and inspired it with a soul, but has also secularized God and the souls. This is the whole truth, and each by itself is only a part.
Apart from psychology, which treats of the individual human soul, there has lately arisen a "psychology of nations" which regards the individual souls as parts of the universal human soul, as individual pieces constituting an aggregate soul which, decidedly, is more than a simple aggregation of numbers. The soul of the psychology of nations has the same relation to the individual souls that modern political economy has to private economy. Prosperity in general is a different question and deals with different matters than the amassing of wealth for your individual pocket. Granted that the national soul is essentially different from the individual soul, what would be the nature of the universal animal soul, including the souls of lions, tigers, flies, elephants, mice, etc.? If we now extend the generalization farther and include in our psychology the vegetable and the mineral kingdom, the various world bodies, our solar system, and finally the whole universe, what else could that signify than a mere rhetorical climax?
Mere generalization is one-sided and leads to fantastical dreams. By this method one can transform anything into everything. It is necessary to supplement generalization by specialization. We wish to have the elephants separated from the fleas, the mice from the lice, at the same time never forgetting the unity of the special and the general. This sin of omission has often been committed by the zoologists in the museums and the botanists in their plant collections, and philosophical investigators of the soul like Fechner have drifted into the other extreme of generalization without specialization.