And the Lord went before them by day in a pillar of a cloud, to lead them the way; and by night in a pillar of fire, to give them light; to go by day and night: Exodus 13:21

The primary purpose of the pillar of cloud by day and the pillar of fire by night was to be a visible reminder to God’s people of His presence with them. Where ever the children of God are, the pillars would stay over them that represent the presence of God.

Everything we do, it should represent God because the presence of God lives in us .. our body is the temple of the living God

We now have the light of God so we should be walking in the light of the gospel of Jesus Christ

Jesus Christ will be the light for us until the earth comes to an end.