He replied, “Because you have so little faith. Truly I tell you, if you have faith as small as a mustard seed, you can say to this mountain, ‘Move from here to there,’ and it will move. Nothing will be impossible for you.”
Faith like a mustard seed may start out very small. But as it is nurtured, it becomes great in size. However, this is not faith in just anything. It is not faith in ourselves or our abilities. It is not faith in the universe. It is faith in the Living God. It is faith that goes beyond what can be visibly seen to envision what is possible with Him. The obstacles in our lives -- even those as large as mountains -- can be moved by His hand.
"Do not be discouraged. Like Gideon, you may be only a cake of barley bread, but by faith you may overturn the tents of Midian. Like the little lad, you may only be able to place five tiny loaves and two small fish in the hands of Jesus, but He will bless them and make them sufficient to feed the multitude. A stone may bring Goliath to the dust; an arrow may pierce through the armour of the mailed warrior. Have faith in God; Reckon on God's faithfulness to you!" -- F.B. Meyer