17:19. Jesus said to them: Because of your unbelief. For, amen I say to you, if you have faith as a grain of mustard seed, you shall say to this mountain: Remove from hence hither, and it shall remove: and nothing shall be impossible to you.

As a grain of mustard seed… That is, a perfect faith; which in its properties, and its fruits, resembles the grain of mustard seed, in the parable, chap. 13. 31.

17:20. But this kind is not cast out but by prayer and fasting.

17:21. And when they abode together in Galilee, Jesus said to them: The Son of man shall be betrayed into the hands of men:

17:22. And they shall kill him, and the third day he shall rise again. And they were troubled exceedingly.

17:23. And when they were come to Capharnaum, they that received the didrachmas, came to Peter, and said to him: Doth not your master pay the didrachma?

The didrachmas… A didrachma was half a sicle, or half a stater; that is, about 15d. English: which was a tax laid upon every head for the service of the temple.

17:24. He said: Yes. And when he was come into the house, Jesus prevented him, saying: What is thy opinion, Simon? The kings of the earth, of whom do they receive tribute or custom, of their own children, or of strangers?

17:25. And he said: Of strangers. Jesus said to him: Then the children are free.

17:26. But that we may not scandalize them, go to the sea, and cast in a hook: and that fish which shall first come up, take: and when thou hast opened it's mouth, thou shalt find a stater: take that, and give it to them for me and thee.