Matthew 13:31-35  The Parable of the Mustard Seed and the Parable of the Leaven.  In God's economy there is no such thing as too small.  Kingdom of Heaven in Jesus's day and the church in ours has spread throughout the world despite starting with one person.  It's affect has touched every nation and area of life even though it had a seemingly insignificant beginning.  No act, no word, nothing is ever too small for God because His power can make it great.