In this episode of 'Walking with Jesus', Evan and Malcolm are reasoning over Luke 13 where Jesus compared the Kingdom of God to one of the smallest seeds in the world... a mustard seed. 

'God’s kingdom is like the smallest seed that one might plant in a garden. When it grows, it becomes a huge tree, with so many spreading branches that various birds make nests there.” '  Luke 13:19 https://my.bible.com/bible/1849/LUK.13.19