I said "Thank you."
Thanks. I needed that.
To give thanks is to acknowledge need.
Outcasts and self-identified sinners view things differently. They know they are needy and undeserving.
Jesus sees the lepers standing at a distance because they are "unclean." He has pity on them.
When the non-entitled foreigner-leper experiences healing he returns to Jesus.
He falls before him.
The words "thank you" cascade out of his heart.