If a well-known evangelist comes to our city and has a crusade and invites all the liberals and ecumenical to be involved, and sends a letter to our church and invites us to join in, we say we cannot. We have to warn them; we are forbidden to do this. We always keep apart saved and unsaved. We must do it in a right spirit but we must not approve them. If we do, we will lose all the fruit of our work in time.