Ezekiel 1:10 – The faces
KJV: As for the likeness of their faces, they four had the face of a man, and the face of a lion, on the right side: and they four had the face of an ox on the left side; they four also had the face of an eagle.
Ezekiel 1:12 “the spirit”:
Ezekiel 1:12
KJV: And they went every one straight forward: whither the spirit was to go, they went; and they turned not when they went.
Ezekiel 1:20 “the spirit of the living creature (calf) was in the wheels”:
Ezekiel 1:20-21
KJV: [20] Whithersoever the
spirit was to go, they went, thither was their spirit to go; and
the wheels were lifted up over against them: for the spirit of the living
creature was in the wheels.
[21] When those went, these went; and when those stood, these stood; and
when those were lifted up from the earth, the wheels were lifted up over against
them: for the spirit of the living creature was in the wheels.
The 2nd living creature from chapter 4 – the calf.
As in “that is a nice set of wheels you have.”
wheel
(hw
l,
w
l)
n.
1. A solid disk or a rigid circular ring connected by spokes to a hub, designed to turn around an axle passed through the center.
2. Something resembling such a disk or ring in appearance or movement or having a wheel as its principal part or characteristic, as:
a. The steering device on a vehicle.
b. A potter's wheel.
c. A water wheel.
d. A spinning wheel.
e. Games A device used in roulette and other games of chance.
f. A firework that rotates while burning.
g. Informal A bicycle.
h. An instrument to which a victim was bound for torture during the Middle Ages.
3. wheels Forces that provide energy, movement, or direction: the wheels of commerce.
4. The act or process of turning; revolution or rotation.
5. A military maneuver executed in order to change the direction of movement of a formation, as of troops or ships, in which the formation is maintained while the outer unit describes an arc and the inner or center unit remains stationary as a pivot.
6. wheels Slang A motor vehicle or access thereto: Do you have wheels tonight?
7. Slang A person with a great deal of power or influence: a wheel in state government.
http://www.thefreedictionary.com/wheels

Along with Rev. 19:10 “spirit of prophecy”:
Revelation 19:10
KJV: And I fell at his feet to worship him. And he said unto me, See thou do it not: I am thy fellowservant, and of thy brethren that have the testimony of Jesus: worship God: for the testimony of Jesus is the spirit of prophecy.
The spirit giving testimony of Jesus’ 2nd Coming is the “spirit in the wheels” and is the spirit of prophecy.