Spirit is the nature of a person, place, or thing. A soul is both body and spirit. If God is not a person, then He does not exist.
Joh 4:22 Ye worship ye know not what: we know what we worship: for salvation is of the Jews.
Joh 4:23 But the hour cometh, and now is, when the true worshippers shall worship the Father in spirit and in truth: for the Father seeketh such to worship him.
Joh 4:24 God is a Spirit: and they that worship him must worship him in spirit and in truth.
Notice the word Spirit (capital 'S'), and spirit in the above. We worship in spirit, but God is the Spirit.