Why the Holy Spirit? (1 Corinthians 3; LD 20)

Sometimes as church members in America we can think that life is about me living for the Lord.  This is not necessarily a bad thing as we should all individually want to live for the Lord.  This is a mindset that really robs Christians of a great and higher understanding of the church.  So, what is the bigger picture of the church?  How does the Holy Spirit bless the church moving us beyond just a radical individual understanding of His blessings?