Parable of the Wheat and the Tares - the Church as a Hospital for Sinners

The parable of the wheat and the tares or weeds is Jesus' response to those who want to cleanse the Christian community of the impure and imperfect.  The Church, in this world, is more a hospital for sinners than a club for saints. At one time or another, we've all dreamed of a perfect world. Imagine a company where everyone is productive, a government full of honest politicians, a church where all are saints.