Jesus told his disciples that even a small amount of faith, like a mustard seed, could accomplish great things. He used the examples of telling a mulberry tree to be uprooted or a mountain to move to illustrate that true faith, no matter how small, can overcome obstacles and problems when one speaks to them in prayer. Later passages and teachers emphasized that it is not the quantity but the quality of one's living faith that enables remarkable things to happen through speaking God's word to challenges in life.