Peter and Cornelius
God has always had a heart to save the world. Even as he chose one people (Israel) as his chosen nation, he promised that they would be a blessing to the whole world--and that his salvation would reach to the ends of the earth. By the time of Jesus, the Jewish people were so focused on their status as the chosen nation, they they had neglecting their calling. And they began to discriminate against everyone else. When the angel of God appeared to Peter and Cornelius in Acts 10, it was a sign that God was fulfilling his promise to include all people, from all nations, in his Kingdom.
But before Cornelius could be converted to Christianity, Peter had to experience his own conversion by an uncomfortable truth that would turn Peter's world upside down.