I remember Frumanchu telling the story that when he was younger he didn't understand some of the Gospel and his mother told him to read Romans 8. He came back to her with some understanding but more questions. She told him to read Romans 9.
He did. And then he understood.
God's word has that kind of power - to shine light into the darkness of our minds and bring forth faith.
To him the porter openeth; and the sheep hear his voice: and he calleth his own sheep by name, and leadeth them out. And when he putteth forth his own sheep, he goeth before them, and the sheep follow him: for they know his voice. And a stranger will they not follow, but will flee from him: for they know not the voice of strangers. John 10:3-5
So then faith [cometh] by hearing, and hearing by the word of God. - Romans 10:17
Verily, verily, I say unto you, He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life. John 5:24
But he answered and said, It is written, Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God. Matt 4:4
And the disciples came, and said unto him, Why speakest thou unto them in parables? 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. 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. Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand.
And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive: For this people's heart is waxed gross, and [their] ears are dull of hearing, and their eyes they have closed; lest at any time they should see with [their] eyes, and hear with [their] ears, and should understand with [their] heart, and should be converted, and I should heal them. But blessed [are] your eyes, for they see: and your ears, for they hear. Matthew 13:14-16