"The Mustard Weed."

The mustard seed shows us that once there is good in the world we find it to spread as fast as it can and it is almost physically impossible for the kingdom of god to be destroyed. Good things that go out into the world just keep going from each person and keeps getting passed and it's a never ending chain. When someone is nice to you then you are going to be in a good mood and nice to someone else. We all help each other and only good can come from that.