The Temple is not just a symbol of the nation, not just the hopeful dwelling place of the presence of God, not just a place for worship and ritual and ceremony and sacrifice, it is also a target for the Lord's enemies. It is almost as an extra burden and responsibility for it's devout. If this place is going to be called by the name of God it's attendants better well represent the God for which it represents. The poor overall historical context of Israel's attempt to do this is a warning and ensample for us today with our "Temple of the Holy Spirit" kjv@1Corinthians:3:16-17.
Paul continues to address the divisions in Corinth. He could have just said to stop it, but, instead used the opportunity to teach important doctrines. The carnal mind has not been escaped to this point as there are envying and strife. Thinking oneself to be wise, glorying in certain men over others when all are doing their work for the Lord are caused by spiritual immaturity. We are taught to look at a much larger picture of what God is doing and how other men and ourselves fit into that.