Because of their unbelief... More on Matthew 13

Remember Jesus earlier had said.

Mat 13:11    He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given.

Mat 13:12    For whosoever hath, to him shall be given, and he shall have more abundance: but whosoever hath not, from him shall be taken away even that he hath.

Mat 13:13    Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand.

John Gill writes...

because it is given to you to know the mysteries of the kingdom of heaven: by the "kingdom of heaven", is meant the Gospel, which treats of the kingdom of heaven, and of things pertaining to it; of the saints' meetness for it, which is the regenerating and sanctifying grace of the Spirit; and of their right to it, which lies in the justifying righteousness of Christ. The "mysteries" of it intend the sublime doctrines thereof; such as relate to the Trinity of persons in the Godhead, to the incarnation of Christ, and the union of the two natures, human and divine, in him, eternal predestination, redemption by Christ, satisfaction by his sacrifice, justification by his righteousness, and pardon through his blood, the resurrection from the dead, &c. things, though clearly revealed, yet may have difficulties attending them, and which are not very easily solved: now to know and understand the great truths of the Gospel, spiritually, savingly, and experimentally, is not from nature, or to be acquired by men's industry, but is the gift of God's grace, flowing from his sovereign will and pleasure; a favour which the disciples of Christ, as a chosen people, receive from the Lord, and which is denied others:

The chapter ends...

50 And shall cast them into the furnace of fire: there shall be wailing and gnashing of teeth.

51 Jesus saith unto them, Have ye understood all these things? They say unto him, Yea, Lord.

52 Then said he unto them, Therefore every scribe which is instructed unto the kingdom of heaven is like unto a man that is an householder, which bringeth forth out of his treasure things new and old.

Later Jesus will instruct them...

Mat 28:18    And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth.

Mat 28:19    Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:

Mat 28:20    Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.

53 And it came to pass, that when Jesus had finished these parables, he departed thence.

54 And when he was come into his own country, he taught them in their synagogue, insomuch that they were astonished, and said, Whence hath this man this wisdom, and these mighty works?

55 Is not this the carpenter's son? is not his mother called Mary? and his brethren, James, and Joses, and Simon, and Judas?

56 And his sisters, are they not all with us? Whence then hath this man all these things?

Verse 28:18 gives an account of those questions.

57 And they were offended in him. But Jesus said unto them, A prophet is not without honour, save in his own country, and in his own house.

58 And he did not many mighty works there because of their unbelief.