Luke 17:11-19 (ESV)
On the way to Jerusalem he was passing along between Samaria and Galilee.  And as he entered a village, he was met by ten lepers, who stood at a distance  and lifted up their voices, saying, "Jesus, Master, have mercy on us."  When he saw them he said to them, "Go and show yourselves to the priests." And as they went they were cleansed.  Then one of them, when he saw that he was healed, turned back, praising God with a loud voice;  and he fell on his face at Jesus' feet, giving him thanks. Now he was a Samaritan.  Then Jesus answered, "Were not ten cleansed? Where are the nine?  Was no one found to return and give praise to God except this foreigner?"  And he said to him, "Rise and go your way; your faith has made you well."
So this is what I have of my sermon in written form.
In faith we show our leprous to Jesus Christ our high-priest who has had mercy on us, and as our priest died on the cross to forgive our sins, sacrificed himself to declare us clean, and heal us of our infirmities.