In today's Gospel reading from Matthew 10, Jesus said to his Apostles: "Do not think that I have come to bring peace upon the earth. I have come to bring not peace but the sword. For I have come to set a man against his father, a daughter against her mother, and...." Division results because of the fact that we are sinners who need salvation. The sword sharpens the contrast between good and evil.
Jesus also said: "Whoever loves father or mother than me is not worthy of me, and whoever loves son or daughter more than me is not worthy of me; and whoever does not take up his cross and follow after me is not worthy of me. Whoever finds his life will lose it, and whoever loses his life for my sake will find it." We need to pay close attention here, for the Lord clearly speaks as God.