Leviticus begins with a list of rituals that the people of God should enact that dramatizes and concretizes what they understand about God. Those rituals should then translate to ethical living. How Israel was called to live with each other and the stranger/alien/immigrant was an extension or continuation of the rituals that made up their worship. This message looks at God's commands to not steal, cheat, or lie and to not swear by God's name. Jesus in Matt 5:33-37 says to not even take an oath at all. Let your "yes" be "yes" and your "no" be "no." In other words, if you have integrity there is no need to swear or make an oath, just keep your word.