Jesus *informed his disciples that they could not cast out a demon because they were faithless and unbelieving. He goes on to say that if they have faith of a mustard seed, they can move a mountain.
Since he said they were faithless and unbelieving, then the contrast must be between having no faith or faith. But what is “mustard seed” faith? Is it just a super tiny amount?
And how does one get such mustard seed faith? Can one just muster it up by strength of the will?
**Elsewhere, Jesus accused Peter of having “little faith” and doubt. Is little faith less than mustard seed faith? After saying Peter had little faith, he asked him why he doubted? Is little faith equal to doubt and less than mustard seed faith?
*19 Then the disciples came to Jesus privately and said, "Why could we not cast it out?" 20 So Jesus said to them, "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 17:19-20
**31 And immediately Jesus stretched out His hand and caught him, and said to him, "O you of little faith, why did you doubt?" Matthew 14:31
It could be that mustard seed faith speaks of the fact of faith, as opposed to doubt or unbelief. It's not how much faith one can muster up, but it is faith, nevertheless, in contrast to doubt or unbelief. As far as the ability to muster up faith at all, it does help if one wants to believe or is willing to be honest and humble enough to be objective, that is, to be persuaded by the facts or evidence.
Peter believed he could walk on water when Jesus gave him the command to come to him. Peter saw Jesus walking on water, and so it was probably that fact and that he knew the miracles that Jesus did, and so, if Jesus gave the command to come to him, he was able to take those steps into the water. But the ***fierceness the weather distracted him and caused him to doubt that he could continue what was humanly impossible .
***28 And Peter answered Him and said, "Lord, if it is You, command me to come to You on the water." 29 So He said, "Come." And when Peter had come down out of the boat, he walked on the water to go to Jesus. 30 But when he saw that the wind was boisterous, he was afraid; and beginning to sink he cried out, saying, "Lord, save me!" Matthew 14:28-30
So Peter started out in faith, but then began to sink when he became afraid, and Jesus attributed this with doubt.
But what did Jesus mean by “little faith?” Is it less than mustard seed faith? Is little faith with more doubt than mustard seed faith? I think speaking of degrees of faith and degrees of doubt can get confusing.
The Greek word translated “little faith” is oligopistos. The Greek word “oligos” can mean “little” as in size, but it can also mean “short” as in duration. The Greek word “pistis” means “faith.” Could it be that Jesus was saying that Peter began well, because he did walk on the water, but it was short-lived? Peter had short-lived faith, for shortly after he began, he was frightened and doubted and began to sink.
Peter didn't have to muster up faith, though he was willing to believe he could walk on water: He only needed the command of Christ to be persuaded it could be done, but the threatening circumstance of the weather distracted him and caused fear and doubt, and so his faith was short lived, and he doubted and began to sink.
It is about how much faith one has, but whether they are persuaded. It helps to want to believe. And for a time, Peter did believe.
The book of James says that God will give wisdom to those who believe and have no doubt: “If any of you lacks wisdom, let him ask of God, who gives to all liberally and without reproach, and it will be given to him. 6 But let him ask in faith, with no doubting, for he who doubts is like a wave of the sea driven and tossed by the wind.” James 1:5-6 This supports the view that faith does not include doubt. This faith must take God at His word, that God will keep His word. Of course, one must understand what this particular wisdom is about—that God will provide. It doesn't mean you will be on the level of of Solomon in earthly wisdom, but it must be understood in light of the context of trials and temptation.
Mustard seed faith must be about what is the object of your faith and not percentages. It's like the man who believed Jesus could heal without coming to his house. Jesus said that he had “great faith”: 10 “When Jesus heard it, He marveled, and said to those who followed, "Assuredly, I say to you, I have not found such great faith, not even in Israel!” Matthew 8:10 The man understood who Jesus was and what he could do. Unlike others who would need Jesus to come to where they needed a miracle, this man understood and was convinced that Jesus work the miracle from anywhere. This man understood the authority of Christ and was without doubt. He did not have to muster up faith he already had. The object of his faith made his faith “great,” though a mustard seed faith would have worked. 4/4/25