“Because of your unbelief; for assuredly, I say to you, if you have faith as a mustard seed, you will say to this mountain, ‘Move from here to there,’ and it will move; and nothing will be impossible for you.” (Matthew 17:20 NKJV).

This was Christ’s response to the disciples when they asked why they had been unable to cast the demon out from the epileptic boy. He told them it was because of their unbelief. They lacked faith in God’s power to heal. Yet, Christ immediately taught them a principle of faith to avoid any possible misunderstanding. He wanted them to stop doubting and believe. They didn’t need faith the size of a mountain, but faith the size of a mustard seed, a seed so small as to make it difficult to see. He used a hyperbole of lesser to greater to illustrate this principle. The phrase “as a mustard seed” shows His use of simile to introduce the lesser (“mustard seed”) to greater (“mountain”) hyperbole. The apostle Paul knew this teaching from Jesus and used it in his list of hyperboles: “If I have all faith, so as to remove mountains, but have not love, I am nothing” (1 Cor. 13:2). It is not the size of your faith, but that you have stopped doubting and started believing. In other words, it is not GREAT faith in God, but faith in a GREAT God. Do you have faith as a mustard seed?