Greetings followjesus
In Matthew 13 in the beginning of the parable of the sower Jesus speaks to them in parables and said
" Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand". All they can understand is carnality, so Jesus speaks on that level to activate their natural reasoning ability that He placed into all men that they might humble themselves and hear the message and begin to spiritually ponder upon such matters of the Spirit.
14
And in them (the rebellious who are focused on earthly things)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:
Because the heart is in rebellion/sin they hear not, see not, and understand not..
15 For this people's heart is waxed gross, (a callused heart in need of circumcision)
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.
they hear not the gospel of holiness and righteousness because of the stubbornness/rebellion of the heart. Paul says what is known of God's wrath and His judgement against sin is already revealed to them, however they suppress the truth in unrighteousness. In fact Paul went on to say
Because that which may be known of God is manifest in them; for God hath shewed it unto them. (the light of conscience is by grace and has been given to every man, John 1-9) Also this grace of God that brings salvation hath appeared to ALL MEN teaching us to live godly, soberly, and righteously IN THIS PRESENT WORLD. Titus 2-11,12
If they humble themselves in repentance and receive the engrafted word that is able to save their souls THEN Jesus should heal them...It all begins with
Matthew 5-4,5 a morning over sin in a season of godly sorrow through repentance, meekness, and humility, in that they should inherit the new earth,
AND THEN 6 Blessed are they which do hunger and thirst after righteousness: for they shall be filled. Many do not hunger and thirst for righteousness, but rather argue at all points in favour of sin because they are in rebellion to God and His commandments, thus they cannot inherit, nor be filled..
However to the obedient from heart purity >>>16 But blessed are your eyes, for they see: and your ears, for they hear.
17 For verily I say unto you, That many prophets and righteous men have desired to see those things which ye see, and have not seen them; and to hear those things which ye hear, and have not heard them.