Jesus said to them, “Because of your unbelief. For truly I say to you, if you have faith like a grain of mustard seed, you will say to this mountain, ‘Move from here to there,’ and it will move. Nothing will be impossible for you.
Jesus answered them, “Truly I say to you, if you have faith and do not doubt, not only will you do what has been done to the fig tree, but even if you say to this mountain, ‘Be taken up and thrown into the sea,’ it will happen.
The Lord said, “If you had faith like a grain of mustard seed, you could say to this mulberry tree, ‘Be uprooted and planted in the sea,’ and it would obey you.
By faith in his name, his name has strengthened this man whom you see and know, and the faith that is through Jesus has given him this perfect health in the presence of you all.
Because he was not weak in faith, he did not consider his own body, now as good as dead (since he was somewhere around a hundred years old), or the deadness of Sarah's womb.