Why were the disciples unable to heal the epileptic? (Mt 17:19-17:20)

“Then the disciples

Came to Jesus privately.

They said.

‘Why could we not cast it out?’

He said to them.

‘Because of your little faith.

Truly!

I say to you!

If you have faith

The size of a mustard seed,

You will say to this mountain.

‘Move from here to there.’

Then it will move.

Nothing will be impossible

For you.’”

 

Τότε προσελθόντες οἱ μαθηταὶ τῷ Ἰησοῦ κατ’ ἰδίαν εἶπον Διὰ τί ἡμεῖς οὐκ ἠδυνήθημεν ἐκβαλεῖν αὐτό;

ὁ δὲ λέγει αὐτοῖς Διὰ τὴν ὀλιγοπιστίαν ὑμῶν· ἀμὴν γὰρ λέγω ὑμῖν, ἐὰν ἔχητε πίστιν ὡς κόκκον σινάπεως, ἐρεῖτε τῷ ὄρει τούτῳ Μετάβα ἔνθεν ἐκεῖ, καὶ μεταβήσεται, καὶ οὐδὲν ἀδυνατήσει ὑμῖν.

τοῦτο δὲ τὸ γένος οὐκ ἐκπορεύεται εἰ μὴ ἐν προσευχῇ καὶ νηστείᾳ.

 

This faith saying can also be found in Mark, chapter 9:28-29.  However, he added the need for prayer, as in the variant Orthodox texts that mentioned fasting also.  The disciples came to Jesus privately (Τότε προσελθόντες οἱ μαθηταὶ τῷ Ἰησοῦ).  They wondered why they were not able to cast out the evil spirits from that boy (κατ’ ἰδίαν εἶπον Διὰ τί ἡμεῖς οὐκ ἠδυνήθημεν ἐκβαλεῖν αὐτό).  Jesus reminded them (ὁ δὲ λέγει αὐτοῖς) of their little faith (Διὰ τὴν ὀλιγοπιστίαν ὑμῶν), a term used predominately by Matthew.  Jesus came back with a solemn pronouncement (ἀμὴν γὰρ λέγω ὑμῖν) that if they had faith the size of a mustard seed (ἐὰν ἔχητε πίστιν ὡς κόκκον σινάπεως), they could move mountains from here to there (ἐρεῖτε τῷ ὄρει τούτῳ Μετάβα ἔνθεν ἐκεῖ, καὶ μεταβήσεται).  Nothing would be impossible for them (καὶ οὐδὲν ἀδυνατήσει ὑμῖν).  If they had faith with prayer and fasting (εἰ μὴ ἐν προσευχῇ καὶ νηστείᾳ), they would be able to cast the evil spirits out (τοῦτο δὲ τὸ γένος οὐκ ἐκπορεύεται).  Matthew continued to emphasize the lack of faith or the little faith of the disciples of Jesus.