If noting in Genesis that the term breath or wind is used, the idea of something powerful and invisible, one could make an argument that these "spirits" are emotional states. Our emotions (including the most basic two Fear and Pleasure), are powerful, real and yet invisible. But I'm not sure that is the spirit that he means.
It probably is what he means. People who are used to reading the Bible start to think in Bible terms (granted, this is a best case scenario). A "minister", for instance, is a "servant", not a church official; the "earth" is the ground, not the planet, etc. Trinitarians, who think of the "Holy Spirit" as a person, drive me up a wall, and those who conjure up images of goblins when the word "spirit" is used, simply live in a different world from me.
Spirits are not emotional states, but emotional states are certainly spirits: They are powerful, producing visible results in a person; but they are invisible to the eye. Infectious disease also fit into this class. Are infectious diseases caused by spirits? Certainly not; but both are invisible and causing an effect; and this is how the ancients described them.
John 3
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1] There was a man of the Pharisees, named Nicodemus, a ruler of the Jews:
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2] The same came to Jesus by night, and said unto him, Rabbi, we know that thou art a teacher come from God: for no man can do these miracles that thou doest, except God be with him.
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3] Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.
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4] Nicodemus saith unto him, How can a man be born when he is old? can he enter the second time into his mother's womb, and be born?
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5] Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God.
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6] That which is born of the flesh is flesh; and that which is born of the Spirit is spirit.
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7] Marvel not that I said unto thee, Ye must be born again.
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8]
The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth: so is every one that is born of the Spirit.
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9] Nicodemus answered and said unto him, How can these things be?
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10] Jesus answered and said unto him, Art thou a master of Israel, and knowest not these things?
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11] Verily, verily, I say unto thee, We speak that we do know, and testify that we have seen; and ye receive not our witness.
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12] If I have told you earthly things, and ye believe not, how shall ye believe, if I tell you of heavenly things?
If Jesus was speaking Hebrew, rather than Greek, the word "wind" above was indistinguishable from the word "spirit". It had to be translated into Greek by its context alone.
God is described as a spirit, someone who is powerful but unseen; and he inhabits a realm that is greater than the known universe. Paul refers to this realm:
2 Cor 12
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1] It is not expedient for me doubtless to glory. I will come to visions and revelations of the Lord.
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2] I knew a man in Christ above fourteen years ago, (whether in the body, I cannot tell; or whether out of the body, I cannot tell: God knoweth); such an one caught up to the third heaven.
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3] And I knew such a man, (whether in the body, or out of the body, I cannot tell: God knoweth);
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4] How that he was caught up into paradise, and heard unspeakable words, which it is not lawful for a man to utter.
Whatever the first two heavens are, the third is certainly beyond human understanding -- so that Paul not only was not able to speak about it; it was not lawful for him to do so. This is the area we are talking about, beyond the "Big Bang", beyond even the possibility of our understanding, beyond time and space as we know it.
What science CANNOT describe, the Bible describes. Trying to find answers about these things from a scientific understanding is completely futile; because science refuses to acknowledge what those who have been to these places say about them. They're like Nicodemus, completely bewildered; but the explanations are quite simple.