When Peter went down to the men, they explained who they were and why they were there.  They told Peter about Cornelius, who he was and how he had been told by God to send for Peter.  After lodging them over night, Peter and some of the other brethren of Joppa accompanied them back to see Cornelius.  Now, Peter had to accept that God had indeed sent them.  Peter could have allowed his prejudices to keep him from going with them, thinking that God could not possibly be sending him a message through a centurian.  We must be careful that we don't become an exclusive club instead of an all inclusive church.  When we begin to see the world as us and them based on color, nationality, or even religious beliefs if those things make us feel that everyone else is unworthy of salvation, then we are not following what God told us to do.  If we feel that other believers based on those same differences are more like step-children of God rather than brothers and sisters in Christ, then that is not what God teaches us.  If we believe that even a tent is good enough for "them" to worship in, but we need a cathedral, then that is not what God teaches us.  There is no us and them in Christianity.  If our comfort is more important than the souls of those "others", then there is something wrong with our belief.  If we feel that we are better than anyone here on earth, but will love them in heaven, there is something wrong.  We, as God's people, are His kingdom on earth, and we need to be careful how we represent that kingdom.