Chariots are for conveyance and progress.
Earthly chariots carry the bodies of those who ride in them over all intervening distances or obstacles to the place of their destination, and God's chariots carry their souls. No words can express the glorious places to which that soul shall arrive who travels in the chariots of God. Earth's chariots are always visible, but God's chariots are invisible. The king of Syria came up against the man of God with horses and chariots that were visible to every one, but God had chariots that could be seen by none save the eye of faith. But the prophet himself sat calmly within his house without fear, because his eyes were opened to see the invisible.