Image by rkimpeljr via Flickrthe truck is slowly churning, the red stripes circling round and round. I visualize the cement and rocks being stirred and tumbled inside. I know this constant tumbling is necessary to keep the soft concrete from setting up and turning to one solid hard mass.
Watching the cement truck, I think of how Christians need the same constant tumbling and churning from fellow Christians. We need to be stirred, to have our thoughts and beliefs tumbled around the heads and hearts and minds of other Believers. We need our thoughts to fall around on the rocks of others so that any hard spots can be broken up, so that we don't become hard or set in ways that are not conformed to the image of our Lord.
When a Believer begins to fall away from the Lord and separates themselves from the fellowship of other Christians, some sort of hardness begins to set up in their heart. Or some sort of wrong thought or doctrine takes form that would have otherwise been broken up by the fellowship and guidance of other believers, had they continued in "assembling together" with other Christians.
We are to be guided in this Christian life by the indwelling Holy Spirit, the written Word of God and the fellowship of other believers. Together these things will act as our "cement truck" keeping us soft and pliable, ready to be used, ready to be conformed to the image of His dear Son.
Rom 8:29 " For whom He did foreknow, He also did predestinate to be conformed to the image of His Son, that He might be the firstborn among many brethren."