The kingdom of heaven is like a mustard seed, which a man took and planted in his field. Though it is the smallest of all your seeds, yet when it grows, it is the largest of garden plants and becomes a tree, so that the birds of the air come and perch in its branches (Matthew 13:31-32).
Matthew 17:20 and Luke 17:6 show us that too often we miss the point of the mustard seed. We think that quantity of faith is the determining factor in getting our prayer requests answered. The mustard seed shows us we all have at least that much faith, and if we learn to employ it, we will see miraculous things happen. Because of Christ Jesus, nothing is impossible for us.
In Luke 17:6, faith is identified as that which makes a difference in one’s circumstances or surroundings – something to happen vs. something felt. This form of faith opens door to God’s transforming us so we can move mountains.
God's Word on That 